Lightwell inc. Interview Questions, Process, and Tips

Ques:- What are your career plans?
Ques:- Design an elevator system for a 100 story building. Address all issues, like number of elevators, speed of each (Not numerically), waiting times etc. There would be 100-200 people living/working on each floor.
Ques:- Two trains are on same track and they are coming toward each other. The speed of first train is 50 KMs/h and the speed of second train is 70 KMs/h. A bee starts flying between the trains when the distance between two trains is 100 KMs. The bee first flies from first train to second train. Once it reaches the second train, it flies back to the second train ? and so on until trains collide. Calculate the total distance traveled by the bee. Speed of bee is 40 KMs/h. .
Recent Answer : Added by DK BOSS On 2021-07-15 09:17:12:

Answer: 66.67 km approx.

Solution:

Let the first train A move at u km/h.
Let the second train B move at v km/h.
Let the distance between two trains be d km
Let the speed of bee be b km/h
Therefore, the time taken by trains to collide = d/(u+v)
Now putting all the known values into the above equation, we get,

u = 50 km/hr
v = 70 km/hr
d = 100 km
b = 80 km/hr

Therfore, the total distance travelled by bee
= b*d/(u+v)
= 80 * 100/(50+70)
= 66.67 km (approx)

Ques:- Out of 80 coins, one is counterfeit. What is the minimum number of weighings needed to find out the counterfeit coin?
Recent Answer : Added by Keagan Jagers On 2022-08-14 16:31:15:

79

Ques:- The prime numbers dividing 143 and leaving a remainder of 3 in each case are
A. 2 and 11
B. 3 and 7
C. 5 and 7
D. 11 and 13
Recent Answer : Added by Mbabazi Nuriat On 2022-05-17 08:55:04:

D

Ques:- Explain yourself?
Ques:- How do you manage to work with people whom you are not comfortable with? What do you do in such situations?
Ques:- Describe your gaps in employment frequent job changes or your being asked to leave your last position?
Ques:- Your director is in another part of the region when you receive an email from another dept requiring the return of a draft framework for a 2 yr strategic plan by 5pm the same day. You realize the original email was sent on a day when there was IT problems and you are unable to track the original email. realizing the director has not been aware of the requirement, you decide to…..”.
Ques:- salary is ‘s’ per month,’x’% of salary is given as bonus, if 3 months salary is s1,s2 & s3 then what is his salary.
Recent Answer : Added by Admin On 2020-05-17 11:59:58:

s1(1+x/100)+s2(1+x/100)+s3(1+x/100)

Ques:- What r u doing now a days?
Ques:- Pandit Birju Maharaj is a well known :
A. Kathak dancer
B. Tabla Master
C. Sarod Master
D. Noneof these
Ques:- What s the full form of GOOGLE and YAHOO?
Ques:- Given n people live in n houses and at some instant all of them disappear and reappear in some other house. What is the probability that no two meet each other.
Ques:- in a group,except 18 above 15 yrs of age and 15 r below 50 yrs of age..how many in that group
Recent Answer : Added by Admin On 2020-05-17 12:04:30:

data inadequate

Ques:- 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.
Recent Answer : Added by DK BOSS On 2021-07-30 16:27:20:

Ans: 60 kph

Suppose Person meets the train everyday at 3 PM at Station A.

His speed is 12kph.

So normally he reaches 5 km before the meeting point (pt B) at (5/12 hr = 25 min before) 2:35PM.

But if he is late by 30 min, then he will reach that point (pt B) by 3:05 PM.

Train is traveling at its normal speed so it covers the distance of 5 Km in 5 min starting from Station A and reaches the meeting point (pt B) at 3:05 PM.

So speed of the train is 5KM/5min = 60 kph.

Ques:- How would you bring in Improvements to the Business?
Ques:- 5 men are equal to as many women as are equal to 8 boys. All of them earn Rs.90 only. Men’s wages are?
Ques:- What important goals have you achieved in the past year?
Ques:- ABOUT PAST EXPE. & REASON OF JOB CHANGE
Ques:- Tell me about urself n family background
Ques:- X and Y start a business jointly. X invests Rs.16000 for 8 months and Y remains in the business for 4 months. Out of the total profit Y claims 2/7th share. How much money is contributed by Y?
Recent Answer : Added by Admin On 2022-09-29 18:33:42:

Let\: the\: total\: price \: be\: Rs. X\: then,

B= 2x/7 & A= \left ( x-2 \right )/7

So, A:B = 5x/7 : 2x/7 = 5 : 2

Let \: B’s \: capital\; be\: Rs.Y\: then\: \left ( 16000\ast 8 \right )/4y= 5/2

=> (16000\ast 8\ast 2)/(4\ast 5) = y

=> y = Rs. 12800

Ques:- Find out the wrong number in each sequence:
10, 14, 28, 32, 64, 68, 132
A. 28
B. 32
C. 68
D. 132
Recent Answer : Added by Anubhav Tiwari On 2022-03-09 16:31:38:

132

Ques:- 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…
Recent Answer : Added by Admin On 2022-09-29 18:02:20:

answer : 36 –Explaination:
X= Chickens
Y = Qty per day

X*Y*9= 12 *.9 *Y*30

x=36

Ques:- Placing Rooks in a chess board
Ques:- Open universities are generally known for imparting :
A. elitist education
B. specialised education
C. distance education
D. general education
Ques:- Grass in lawn grows equally thick and in a uniform rate. It takes 24 days for 70 cows and 60 days for 30 cows to eat the whole of the grass. How many cows are needed to eat the grass in 96 days?
Recent Answer : Added by Admin On 2020-05-17 12:01:01:

Use 3pt. Formula
( (x-x1)/(x2-x1) )=( (y-y1)/(y2-y1) )
We get 150

Ques:- How will you be able to justify yourself as per your CV records?
Ques:- UK Shift timings and salary
Ques:- Describe your profile

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Devendra Bhardwaj With a decade of experience as a Job Hiring Expert, I am a results-driven professional dedicated to elevating recruitment strategies. My expertise lies in navigating the dynamic landscape of talent acquisition, employing innovative approaches to attract, assess, and secure top-tier candidates. I excel in optimizing hiring processes, leveraging cutting-edge technologies, and fostering collaborative relationships with stakeholders. A keen understanding of industry trends allows me to stay ahead, ensuring a competitive edge in securing the best talent for your organization. I am passionate about connecting the right people with the right opportunities and thrive in creating impactful, streamlined recruitment solutions.

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