Ball Puzzle Solution

The solution is easy. Mark the buckets from 1 to 10 and pick one ball from 1 bucket.
2 balls from 2nd bucket.
3 balls from 3rd bucket and so on.
till
10 balls from 10th bucket.

Now weigh them on the weighing machine and check your reading.
let's say it displays 54.9 grams.
Ideally it should have been 55 grams if all the balls were of 1 gram so since there is a difference of 0.1 gram in the solution therefore

bucket no 1 contains the balls weighing 0.9 gram.
Similarly it can be predicted depending upon the weight displayed by the weighing balance.

Ball Puzzle

This puzzle is asked in most of the interview questions and sounds tough whenever you hear it first time.
There are 10 buckets each containing 100 small balls weighing 1 gram except the one bucket which contains balls weighing 0.9 gram. All the balls are of same colour and looks same. You are given a weighing machine which displays the weight in grams. You have to use it only once and you have to find out which bucket contains 0.9 gram balls.

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Salary Puzzle Solution

Well it's easy but you have to do some mathematics for it.

let the salary of person be denoted by XS,YS and ZS.
let person X writes a number that includes her salary and a random number say r1. so the random number is (XS+r1). Now Y adds a number to it which includes her salary and a random number(YS+r2). Z does the same thing with ZS and r3. Now X removes his random number r1 from the total. After X Y and Z does the same thing to the sum. After Z has subtracted her random number the total is the sum of the salaries of X,Y and Z. So the average will be the number divided by 3.

Salary Puzzle

 Three persons X,Y and Z would like to know their average salaries without disclosing their own salaries. How can they do it?

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