Koala Interview Questions Answers, HR Interview Questions, Koala Aptitude Test Questions, Koala Campus Placements Exam Questions

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This page contains the most recently asked technical questions and answers in the Koala.

All of the questions listed below were collected by students recently placed at Koala.

Ques:- In what ratio must tea at Rs. 62 per kg be mixed with tea at Rs. 72 per kg so that the mixture must be worth Rs. 64.50 per kg?
A. 3 : 1
B. 3 : 2
C. 4 : 3
D. 5 : 3
Recent Answer : Added by bing chilling On 2022-01-19 15:38:41:

The answer is A)

y1 = 62 Rs/kg
y2 = 72 Rs/kg
y = 64.5 Rs/kg

y2 – y1 = 10 Rs/kg

The distance between the y and y1 is

y – y1 = 64.5 – 62 = 2.5

x1 = (y – y1)/(y2 – y1) = 2.5/10 = 0.25
x2 = 1 – x1 = 1 – 0.25 = 0.75

The target price is calculated by the lever method.

x1 * y2 + x2 * y1 = 0.25 * 72 + 0.75 * 62.5 = 64.5

The ratio is of y1 to y2 is

0.75 : 0.25

Divide by both by 0.25

3 : 1

Ques:- There are 9 balls of equal size and same weight(they look similar) except 1. How many weights required to find the dissimilar ball using a weighing balance?
Recent Answer : Added by G Dinesh On 2023-06-10 18:20:22:

Here is the solution to the given version of the puzzle (9 balls, one is heavier, need to identify oddball), where we label the balls A, B, …, I:

1. Weigh ABC versus DEF.

Scenario a: If these (1) balance, then we know the oddball is one of G, H, I.

2. Weigh G versus H.

Scenario a.i: If these (2) balance, the oddball is I.

Scenario a.ii: If these (2) do not balance, the heavier one is the oddball.

Scenario b: If these (1) do not balance, then the oddball is on the heavier side. For simplicity, assume the ABC side is heavier, so the oddball is one of A, B, C.

2. Weigh A versus B.

Scenario b.i: If these (2) balance, the oddball is C.

Scenario b.ii: If these (2) do not balance, the heavier one is the oddball.

answer is maximum of 2.

Ques:- Perimeter of front wheel =30, back wheel = 20. If front wheel revolves 240 times. Howm many revolutions will the back wheel take?
Recent Answer : Added by Admin On 2020-05-17 11:59:16:

360 times

Ques:- Do you have a reference lis?. What goals do you have in your career?
Ques:- TEAM ? Together Everyone Achieves More
Ques:- You are working in your organization from 3 months. why do you want to live?

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Ques:- In the first 10 overs of a cricket game, the run rate was only 3.2. What should be the run rate in the remaining 40 overs to reach the target of 282 runs?
Recent Answer : Added by dilshad On 2021-03-26 17:27:31:


Ques:- How many years experience you have in this field?
Ques:- The areas of the two spheres are in the ratio 1: 4. What is the ratio of their volume ?
Recent Answer : Added by BINDHU REDDY On 2021-08-09 01:51:51:


Ques:- If BOMBAY is written as MYMYMY, how will TAMIL NADU be written in that code ?
Ques:- A train 800 m long is running at a speed of 78 km/hr. If it crosses a tunnel in 1 min, then the length of the tunnel is?
Recent Answer : Added by Admin On 2022-09-28 18:39:42:

Let length of tunnel is x meter
Distance = 800+x meter
Time = 1 minute = 60 seconds

Speed = 78 km/hr = 78*5/18 m/s = 65/3 m/s

Distance = Speed*Time

Ques:- We finish the interview and you step outside the office and find a lottery ticket that ends up winning $10 million. What would you do?
Ques:- What is your objective of life?
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