Colour of the Last Ball

February 2, 2022

Colour Of The Last Ball

  What is the colour of the last ball?

Here the task is to find the colour of the last ball?Given below is the premise, rule and objective of the puzzle. Read them carefully and find the solution for the same.

Premise – You have a bag that contains 20 blue balls and 13 red balls.

Rules – 1 – The task is to pick two balls in succession.

                 2 – If the balls are the same colour then you remove them and replace them with a blue ball.

                 3 – If the balls are of a different colour then you remove them and replace them with a red ball.

Objective – What is the last ball’s colour?

Solution to Ball Puzzle

As we know the rule and objective for this puzzle we can achieve our aim by following the below steps:-

  1. In this puzzle we will apply the concept of Odds and Evens to find the ball’s colour.
  2. For an instance, if you pick a red ball and a blue ball in succession, then you will place a red ball inside the bag as per the 3rd rule.
  3. If you pick a the two balls you will place a blue colour ball inside the bag as per 2nd rule.
  4. As we know that there are 13 red balls in the bag , that makes it an odd number.
  5. Therefore, the last ball will always be a red ball through the odds and even process.

To solve more such puzzles which are asked at various levels of a company’s recruitment exams , click here.

Colour of the Last Ball
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