About ConsultAdd
Company Description
ConsultAdd is a leading global consulting firm specializing in providing innovative technology solutions and consulting services. The company prides itself on fostering a collaborative and inclusive work environment that encourages creativity and professional growth. With a strong emphasis on teamwork, ConsultAdd promotes a culture of learning and development, ensuring that employees have access to the resources and training they need to excel in their roles. The work environment is dynamic and fast-paced, where employees are encouraged to share ideas and drive initiatives that lead to impactful results for clients. ConsultAdd's commitment to diversity and inclusion is evident in its hiring practices and employee engagement programs, making it a great place for professionals to build their careers.
Software Developer Interview Questions
Q1: What programming languages are you proficient in?
I am proficient in several programming languages, including Java, Python, and JavaScript. I have utilized these languages in various projects, such as developing web applications and automating processes.
Q2: Can you describe a challenging coding problem you solved and how you approached it?
One challenging problem I faced was optimizing a slow database query. I approached it by analyzing the query execution plan, identifying bottlenecks, and implementing indexing strategies, which resulted in a significant performance improvement.
Q3: How do you ensure the quality of your code?
I ensure code quality by following best practices such as writing unit tests, conducting code reviews with peers, and using static code analysis tools to catch potential issues early on.
Q4: What is your experience with Agile methodologies?
I have worked in Agile environments for several years, participating in daily stand-ups, sprint planning, and retrospectives. This experience has helped me understand the importance of flexibility and collaboration in software development.
Q5: How do you stay updated with the latest technology trends?
I stay updated by following industry blogs, attending webinars, and participating in online courses. I also engage with the developer community on platforms like GitHub and Stack Overflow.
Data Analyst Interview Questions
Q1: What data analysis tools and software are you familiar with?
I am familiar with tools such as Excel, SQL, and Python for data manipulation and analysis, as well as visualization tools like Tableau and Power BI for presenting data insights.
Q2: Can you describe a project where you used data to drive business decisions?
In my previous role, I analyzed customer feedback data to identify trends in product satisfaction. My findings led to actionable recommendations that improved our product features and increased customer retention by 15%.
Q3: How do you ensure data accuracy in your reports?
I ensure data accuracy by implementing data validation techniques, cross-referencing data with multiple sources, and conducting regular audits of my datasets to catch any discrepancies.
Q4: What is your experience with statistical analysis?
I have a solid foundation in statistical analysis, including hypothesis testing and regression analysis. I have applied these techniques to interpret data and make informed predictions.
Q5: How do you communicate complex data findings to non-technical stakeholders?
I focus on simplifying my findings by using clear visuals, avoiding jargon, and relating the data back to business objectives. I also ensure that I am open to questions and feedback during presentations.
Project Manager Interview Questions
Q1: What project management methodologies are you experienced with?
I have experience with both Agile and Waterfall methodologies. I adapt my approach based on the project requirements and team dynamics to ensure successful project delivery.
Q2: Can you provide an example of a project you led and the outcome?
I led a cross-departmental project to implement a new CRM system. By coordinating with various teams and adhering to timelines, we successfully launched the system ahead of schedule, resulting in a 20% increase in sales team efficiency.
Q3: How do you handle project scope changes?
I handle scope changes by assessing the impact on timelines and resources, communicating with stakeholders to realign expectations, and documenting changes to ensure transparency throughout the project lifecycle.
Q4: What tools do you use for project management and collaboration?
I utilize tools such as Jira for tracking progress, Trello for task management, and Slack for team communication. These tools help keep everyone informed and engaged throughout the project.
Q5: How do you motivate your team during challenging projects?
I motivate my team by fostering an open and supportive environment, recognizing individual contributions, and ensuring that everyone understands the project's importance. Regular check-ins also help maintain morale and address any concerns.
(Note: The above roles and questions are illustrative and may not reflect the actual roles at ConsultAdd.)
Company Background and Industry Position
ConsultAdd stands out as a dynamic player in the IT consulting and software services arena, carving a niche with its emphasis on innovative solutions and client-centric approaches. Founded in the early 2010s, this firm has rapidly transitioned from a modest startup to a recognized name among mid-to-large scale enterprises seeking technology-driven transformation. The company’s expertise spans across cloud computing, data analytics, and enterprise application development, positioning itself as a reliable partner for digital modernization.
What’s particularly interesting about ConsultAdd is how it blends consulting with hands-on software engineering, enabling clients to both strategize and implement solutions under one roof. This dual capability shapes the kind of talent they seek — versatile professionals who can navigate both the business and technical landscapes comfortably. While it doesn’t boast the scale of giants like Accenture or Infosys, ConsultAdd’s boutique-like agility appeals to candidates looking for a fast-paced environment without the weight of huge corporate bureaucracy.
How the Hiring Process Works
- Application and Resume Screening: The initial funnel in the hiring pipeline involves a careful resume evaluation by recruiters and hiring managers. They prioritize candidates whose profiles reflect alignment not only in skills but also in adaptability — a trait essential for ConsultAdd’s multifaceted roles.
- Technical Assessment: Depending on the role, candidates may be required to clear an online coding test or submit a technical assignment. This step deep-dives into problem-solving capabilities and practical application of core technical concepts.
- Technical Interview Round(s): The first live interaction typically involves a panel of engineers probing core competencies, algorithms, system design, and sometimes domain-specific knowledge. They aim to assess not just correctness but approach, optimization, and clarity in communication.
- Managerial or HR Interview: Post the technical hurdle, candidates face HR or hiring managers to discuss cultural fit, motivation, and logistical details including salary expectations and joining timelines.
- Offer and Onboarding: Successful candidates receive an offer packet detailing compensation, benefits, and role specifics, followed by a structured onboarding sequence to integrate into projects swiftly.
This above structure is common across many IT firms, but ConsultAdd’s emphasis on early cultural and adaptability checks means no one escapes the HR round without a genuine conversation, unlike in some companies where it’s a mere formality.
Interview Stages Explained
Technical Screening
The technical screening isn’t just about coding prowess. Candidates often notice that the tests are tailored to reflect real-world challenges rather than abstract puzzles. For example, a backend developer might be given API design scenarios, or a cloud engineer might troubleshoot deployment scripts. This is deliberate — ConsultAdd wants to gauge how candidates handle day-to-day problems rather than textbook questions. Expect around 30 to 60 minutes of focused tasks, sometimes on platforms like HackerRank or Codility.
Technical Interview(s)
These rounds can stretch anywhere from one to two hours. Senior engineers or team leads often conduct these, probing both depth and breadth of knowledge. It’s not unusual for candidates to face whiteboarding sessions for system design, or live coding where explaining thought process counts as much as the code itself. They might throw in situational questions: “How would you architect a scalable notification system?” or “Describe trade-offs you considered in your last project.”
One subtle yet critical aspect here is communication clarity. ConsultAdd stresses collaborative problem-solving, so if you can’t explain your reasoning, you risk being misunderstood and potentially rejected, even if your solution is mathematically correct.
HR and Cultural Fit Discussion
This round delves deeper than salary talks. The HR interviewer or hiring manager wants to understand your long-term career goals, flexibility in work style, and how you handle feedback or conflict. Questions might feel personal — like “Tell me about a time you failed and what you learned” — but they serve a purpose. ConsultAdd’s culture thrives on learning and resilience, so candidates who come across as growth-oriented tend to shine.
Be ready to discuss salary expectations, but also prepare to negotiate diplomatically. Unlike some firms with rigid pay scales, ConsultAdd offers some flexibility, especially for top performers or niche skill sets.
Examples of Questions Candidates Report
- Explain the difference between REST and SOAP web services.
- Write a program to detect a cycle in a linked list.
- Design a URL shortening service like bit.ly. What components would you include?
- How do you manage version control in collaborative projects?
- Describe a challenging bug you fixed and the steps taken.
- What motivates you to work in consulting versus product development?
- How do you prioritize multiple deadlines in a fast-moving environment?
Eligibility Expectations
ConsultAdd generally looks for candidates holding a bachelor’s degree in computer science, IT, or related fields, though they do consider equivalent experience in some cases. Freshers can apply for entry-level positions, provided they demonstrate solid fundamentals and a hunger to learn.
For mid-level or senior roles, 3 to 7 years of relevant experience is often expected. Candidates should ideally have hands-on exposure to the specific technology stacks pertinent to the job role. Additionally, soft skills such as teamwork, communication, and problem-solving are non-negotiable.
Interestingly, ConsultAdd does not emphasize fancy certifications as much as practical skills. So, it’s more about what you can demonstrate than what you list on your resume.
Common Job Roles and Departments
ConsultAdd’s hiring largely focuses on the following categories:
- Software Development: Backend, frontend, and full-stack developers working with Java, .NET, JavaScript frameworks, and emerging technologies.
- Cloud Engineering and DevOps: Specialists in AWS, Azure, Docker, Kubernetes, streamlining deployment pipelines and infrastructure automation.
- Data Science and Analytics: Roles involving machine learning models, big data tools, and data visualization for actionable business insights.
- Quality Assurance and Testing: Automated and manual testers ensuring software reliability and compliance with standards.
- Project Management and Business Analysis: Roles bridging technical teams with client expectations, managing timelines, and delivering value.
The company structure encourages cross-functional collaboration, which means many roles are hybrids, requiring candidates to be comfortable stepping beyond narrow silos.
Compensation and Salary Perspective
| Role | Estimated Salary |
|---|---|
| Entry-Level Software Developer | ₹3,50,000 - ₹5,00,000 per annum |
| Mid-Level Software Engineer | ₹6,00,000 - ₹9,00,000 per annum |
| Senior Cloud Engineer | ₹10,00,000 - ₹15,00,000 per annum |
| Data Scientist | ₹8,00,000 - ₹14,00,000 per annum |
| QA Lead | ₹7,00,000 - ₹11,00,000 per annum |
| Project Manager | ₹12,00,000 - ₹18,00,000 per annum |
These figures are reflective of industry norms within the Indian IT consulting space, slightly higher in metros and for candidates with niche expertise. ConsultAdd maintains competitive salary packages to attract and retain quality talent while balancing project budgets.
Interview Difficulty Analysis
From what candidates often share, the ConsultAdd interview is moderately challenging. It’s not designed to weed out large percentages through trick questions but aims to realistically evaluate your readiness for actual client engagements. Candidates with practical experience in relevant domains breeze through technical rounds, while those more academically inclined but less experienced may stumble on scenario-based questions.
One common pain point is the system design segment for mid to senior roles, where many candidates find themselves underprepared. Another subtle difficulty is the behavioral round’s emphasis on cultural fit — it can take you by surprise if you’re used to purely technical interviews without personality probes.
Compared to large MNCs like TCS or Wipro, ConsultAdd’s process feels more personable but demands clear communication and adaptability. It’s less about memorized answers and more about authentic, informed responses.
Preparation Strategy That Works
- Master core programming concepts and practice coding on platforms like LeetCode or HackerRank to build fluency.
- Deepen your understanding of system design basics — read case studies and practice articulating trade-offs aloud.
- Brush up on the technologies specifically mentioned in the job description; hands-on practice beats theoretical knowledge every time.
- Prepare real examples reflecting teamwork, conflict resolution, and learning from failures to answer behavioral questions honestly.
- Mock interviews are invaluable — simulate both technical and HR rounds with peers or mentors to build confidence and receive feedback.
- Research ConsultAdd’s projects and culture by following their blogs or LinkedIn posts to tailor your responses and show genuine interest.
- Set realistic expectations about salary based on your experience; have a rationale ready for your expected range to avoid awkward negotiations.
Work Environment and Culture Insights
Candidates often describe ConsultAdd’s work atmosphere as collaborative and fast-moving. Unlike vast IT firms where individuals sometimes feel like tiny cogs, here, you’re more likely to interact directly with senior leadership and clients. The company fosters open communication and encourages employees to take ownership of their work, which can be exhilarating but also demanding.
There’s a palpable emphasis on continuous learning; regular training sessions and knowledge-sharing forums are common. However, with growth ambitions come tight deadlines and occasional crunch times — so resilience and time management skills are assets.
From a cultural perspective, ConsultAdd values diversity and inclusion, maintaining a reasonably balanced gender and cultural mix. While the environment leans toward informal dress codes and flexible work hours, professionalism in communication remains paramount.
Career Growth and Learning Opportunities
For those invested in long-term careers, ConsultAdd offers a compelling proposition. The company actively encourages lateral moves across departments, allowing employees to build cross-domain expertise. Many engineers transition into consulting roles or project management with internal support, which is a notable advantage.
Mentorship programs and technical workshops provide avenues to upskill continuously. Performance evaluations, though rigorous, come with clear feedback loops, enabling candidates to chart personalized growth trajectories.
Importantly, ConsultAdd’s client portfolio spans various industries — from finance to healthcare — meaning exposure to diverse business challenges, which enriches professional experience beyond coding or engineering.
Real Candidate Experience Patterns
A recurring theme among applicants is the sense that ConsultAdd interviews are conversational rather than interrogative. One software engineer candidly mentioned, “It felt like brainstorming rather than grilling, which helped me relax and think clearly.” However, this ease doesn’t translate to a shortcut. The team tests depth, so surface-level answers won’t suffice.
Several candidates observed that the HR round is surprisingly introspective. One reflected, “They asked me why consulting and how I handle ambiguity — questions I hadn’t prepared for but which made me think deeply.” This reveals the company’s intent to hire adaptable, self-aware professionals.
Some entry-level applicants note that the technical tests can be tricky under time pressure, recommending thorough timed practice. Meanwhile, mid-level candidates highlight the importance of illustrating impact, not just tasks performed — essentially selling your story effectively.
Comparison With Other Employers
| Aspect | ConsultAdd | Large MNCs (e.g., TCS, Infosys) | Startups |
|---|---|---|---|
| Interview Style | Real-world, scenario-based, conversational | Structured, often theoretical, multiple rounds | Highly variable, focus on culture fit and coding |
| Speed of Hiring | Moderate; thorough but not overly slow | Often slow due to scale and bureaucracy | Fast, sometimes rushed decisions |
| Candidate Experience | Personalized and transparent | Mixed; sometimes impersonal due to volume | Highly personal but unpredictable |
| Salary Competitiveness | Moderate to high, flexible | Stable but sometimes lower for freshers | Varies widely, often equity-based |
| Growth Opportunities | Cross-domain, mentorship-focused | Structured with clear hierarchies | Fast growth but less formalized |
In essence, ConsultAdd strikes a balance between the structured approach of large firms and the agility of startups, appealing to candidates seeking stability with room for creative problem-solving.
Expert Advice for Applicants
Prepare as if you’re stepping into a consulting role, not just a coding job. That means honing communication skills alongside technical abilities. Remember, ConsultAdd values adaptability — be ready to discuss how you navigate change or ambiguous situations.
Don’t underestimate the HR round; treat it as an opportunity to showcase your personality and alignment with company values. Research recent company news or projects to demonstrate genuine curiosity.
When discussing salary, aim for transparency but be flexible. Have a range backed by market research rather than fixed figures.
Lastly, post-interview follow-ups matter. A thoughtful thank-you email reflecting on parts of the conversation can set you apart subtly.
Frequently Asked Questions
What kind of technical questions should I expect during the interview?
You’ll face practical problem-solving questions tailored to the role, including coding algorithms, system design scenarios, and domain-specific challenges such as cloud deployment or API design. The emphasis is on clarity and logic over trick questions.
How important is the HR round in the overall selection process?
Very important. It assesses cultural fit, communication skills, and your motivation for joining ConsultAdd. It’s not just a formality; your attitude and adaptability are examined closely here.
Is prior consulting experience mandatory?
Not necessarily. While consulting experience helps, the company also hires candidates from pure development or engineering backgrounds if they demonstrate problem-solving agility and client-oriented thinking.
What’s the usual timeline between application and offer?
Typically, the process spans two to four weeks, though it can vary depending on role urgency and candidate responsiveness.
Are there opportunities for remote work?
ConsultAdd has adopted flexible policies post-pandemic, including remote and hybrid work options, but this depends largely on project needs and client preferences.
Final Perspective
Walking through the ConsultAdd hiring journey reveals a company that values substance over spectacle. Their recruitment approach balances rigorous technical evaluation with genuine interest in who you are as a professional and person. It’s not a maze of endless rounds but a thoughtful process aimed at finding talent that thrives in fluid, client-focused environments.
If you’re drawn to a role where you can both code and consult, and want a workplace that pushes you while supporting your growth, ConsultAdd is worth serious consideration. Prepare not just to showcase skills but to tell your story authentically. The real edge lies in blending technical mastery with self-awareness and a collaborative spirit — that’s the kind of candidate ConsultAdd is eager to welcome.
ConsultAdd Interview Questions and Answers
Updated 21 Feb 2026Technical Support Engineer Interview Experience
Candidate: Priya Singh
Experience Level: Mid-level
Applied Via: Employee referral
Difficulty:
Final Result: Rejected
Interview Process
3
Questions Asked
- How do you troubleshoot network issues?
- Describe a time you handled a difficult customer.
- What is your experience with ticketing systems?
- Explain the OSI model.
- How do you prioritize support tickets?
Advice
Gain hands-on experience with common support tools and practice situational responses.
Full Experience
Referred by a friend, I went through three rounds: HR, technical, and a practical troubleshooting test. The technical round was challenging with in-depth questions on networking. Unfortunately, I was not selected but received constructive feedback to improve my technical knowledge.
Quality Assurance Engineer Interview Experience
Candidate: Sanjay Patel
Experience Level: Entry-level
Applied Via: Campus recruitment
Difficulty: Easy
Final Result:
Interview Process
2
Questions Asked
- What is the difference between manual and automated testing?
- Explain the software testing life cycle.
- Have you used any testing tools?
- How do you write test cases?
- What is regression testing?
Advice
Understand basic testing concepts and be confident during interviews.
Full Experience
I was selected through campus recruitment. The process had a written test followed by an HR interview. The questions were straightforward focusing on fundamentals. I was offered an internship which later converted to a full-time role.
Project Manager Interview Experience
Candidate: Meera Joshi
Experience Level: Mid-level
Applied Via: LinkedIn job post
Difficulty:
Final Result:
Interview Process
3
Questions Asked
- Describe your project management methodology.
- How do you handle project risks?
- Explain a time you managed a difficult team member.
- What tools do you use for project tracking?
- How do you ensure project delivery on time?
Advice
Highlight your leadership skills and provide real examples of managing projects end-to-end.
Full Experience
I applied via LinkedIn and was contacted for a telephonic interview. The first round was HR, the second was a technical round focusing on project management scenarios, and the final was with the senior management. They valued my practical experience and communication skills.
Business Analyst Interview Experience
Candidate: Rahul Verma
Experience Level: Senior
Applied Via: Referral
Difficulty:
Final Result: Rejected
Interview Process
4
Questions Asked
- How do you gather requirements from stakeholders?
- Explain a time you resolved a conflict in a project.
- What tools do you use for process modeling?
- Describe your experience with data analysis.
- How do you prioritize tasks in a project?
Advice
Prepare for behavioral questions and case studies related to business scenarios.
Full Experience
I was referred by a current employee and went through four rounds. The first was HR screening, followed by a technical round with scenario-based questions. The third was a case study presentation, and the last was a managerial round focusing on leadership and communication skills. Despite good technical answers, I was told my approach to stakeholder management could be improved.
Software Developer Interview Experience
Candidate: Anita Sharma
Experience Level: Mid-level
Applied Via: Online application via company website
Difficulty:
Final Result:
Interview Process
3
Questions Asked
- Explain OOP concepts.
- Describe a challenging project you worked on.
- Write a function to reverse a linked list.
- How do you handle version control?
- What is your experience with Agile methodologies?
Advice
Brush up on data structures and be ready to discuss past projects in detail.
Full Experience
I applied through the company website and was invited for a technical round after initial screening. The first round was a coding test focusing on data structures and algorithms. The second was a technical interview where they asked about my previous projects and problem-solving approaches. The final round was with the team lead focusing on culture fit and Agile practices. Overall, the process was smooth and fair.
Frequently Asked Questions in ConsultAdd
Have a question about the hiring process, company policies, or work environment? Ask the community or browse existing questions here.
Common Interview Questions in ConsultAdd
Q: In a sports contest there were m medals awarded on n successive days (n > 1). 1. On the first day 1 medal and 1/7 of the remaining m - 1 medals were awarded. 2. On the second day 2 medals and 1/7 of the now remaining medals was awarded; and so on.On the nth and last day, the remaining n medals were awarded.How many days did the contest last, and how many medals were awarded altogether?
Q: A rich merchant had collected many gold coins. He did not want anybody to know about them. One day his wife asked, "How many gold coins do we have?" After pausing a moment, he replied, "Well! If I divide the coins into two unequal numbers, then 32 times the difference between the two numbers equals the difference between the squares of the two numbers."The wife looked puzzled. Can you help the merchant's wife by finding out how many gold coins they have?
Q: A rich man died. In his will, he has divided his gold coins among his 5 sons, 5 daughters and a manager. According to his will: First give one coin to manager. 1/5th of the remaining to the elder son.Now give one coin to the manager and 1/5th of the remaining to second son and so on..... After giving coins to 5th son, divided the remaining coins among five daughters equally.All should get full coins. Find the minimum number of coins he has?
Q: There are two balls touching each other circumferencically. The radius of the big ball is 4 times the diameter of the small all. The outer small ball rotates in anticlockwise direction circumferencically over the bigger one at the rate of 16 rev/sec. The bigger wheel also rotates anticlockwise at N rev/sec. What is 'N' for the horizontal line from the centre of small wheel always is horizontal.
Q: 3 policemen and 3 thieves had to cross a river using a small boat. Only two can use the boat for a trip. All the 3 policemen and only 1 thief knew to ride the boat. If 2 thieves and 1 policeman were left behind they would kill him. But none of them escaped from the policemen. How would they be able to cross the river?
Q: 36 people {a1, a2, ..., a36} meet and shake hands in a circular fashion. In other words, there are totally 36 handshakes involving the pairs, {a1, a2}, {a2, a3}, ..., {a35, a36}, {a36, a1}. Then size of the smallest set of people such that the res...
Q: T, U, V are 3 friends digging groups in fields. If T & U can complete i groove in 4 days &, U & V can complete 1 groove in 3 days & V & T can complete in 2 days. Find how many days each takes to complete 1 groove individually.
Q: The citizens of planet nigiet are 8 fingered and have thus developed their decimal system in base 8. A certain street in nigiet contains 1000 (in base 8) buildings numbered 1 to 1000. How many 3s are used in numbering these buildings?
Q: ABCDE are sisters. Each of them gives 4 gifts and each receives 4 gifts No two sisters give the same combination ( e.g. if A gives 4 gifts to B then no other sisters can give four to other one.)Â (i) B gives four to A.(ii) C gives 3 to E. How much did A,B,C,E give to D?
Q: Tom has three boxes with fruits in his barn: one box with apples, one box with pears, and one box with both apples and pears. The boxes have labels that describe the contents, but none of these labels is on the right box. How can Tom, by taking only one p
Q: A vessel is full of liquid. From the vessel, 1/3rd of the liquid evaporates on the first day. On the second day 3/4th of the remaining liquid evaporates. What fraction of the volume is present at the end of the second day
Q: There are 7 letters A,B,C,D,E,F,GAll are assigned some numbers from 1,2 to 7.B is in the middle if arranged as per the numbers.A is greater than G same as F is less than C.G comes earlier than E.Which is the fourth letter
Q: In a Park, N persons stand on the circumference of a circle at distinct points. Each possible pair of persons, not standing next to each other, sings a two-minute song ? one pair immediately after the other. If the total time taken for singing is 28 minutes, what is N?
Q: Give two dice - one is a standard dice, the other is blank (nothing painted on any of the faces). The problem is to paint the blank dice in such a manner so that when you roll both of them together, the sum of both the faces should lie between 1 and 12. Numbers from 1-12 (both inclusive) equally likely.
Q: A family X went for a vacation. Unfortunately it rained for 13 days when they were there. But whenever it rained in the mornings, they had clear afternoons and vice versa. In all they enjoyed 11 mornings and 12 afternoons. How many days did they stay there totally?
Q: A man driving the car at twice the speed of auto one day he was driven car for 10 min. and car is failed. he left the car and took auto to go to the office .he spent 30 min. in the auto. what will be the time take by car to go office?
Q: A person meets a train at a railway station coming daily at a particular time. One day he is late by 25 minutes, and he meets the train 5 k.m. before the station. If his speed is 12 kmph, what is the speed of the train.
Q: There are some chickens in a poultry. They are fed with corn. One sack of corn will come for 9 days. The farmer decides to sell some chickens and wanted to hold 12 chicken with him. He cuts the feed by 10% and sack of corn comes for 30...
Q: Motorboat A leaves shore P as B leaves Q; they move across the lake at a constant speed. They meet first time 600 yards from P. Each returns from the opposite shore without halting, and they meet 200 yards from. How long is the lake?
Q: Four persons have to cross the bridge they are having one torch light. Four persons take 1,2,5,10 minutes respectively, when two persons are going they will take the time of the slowest person. What is the time taken to cross by all of them.