Interview Question

QA Lead Interview

-

Promethean World

8 balls 1 is heavier than the rest. You can weight the balls 2 times how do you find the heavier ball.

AnswerAdd Tags

Interview Answers

2 Answers

1

Weigh 3 on one side and 3 on the other if one side tilts weigh two balls if there is a tilt you know the ball no tilt its the one you left out.

Anonymous on

0

Step I: Pick 6 balls and weigh them 3 on each side. Step II: 1. If the balls balance each other, then weigh the remaining two balls and the heavier one will tilt the balance on its side. 2. If the balls do not balance each other, then the heavier ball should be one of the three balls on the side the balance tilts. From these three balls, discard one of them and choose the other two to weigh. If the two balls balance each other, then the heavier one is discarded third balls. Else the heavier one will tilt the balance on its side.

ONE WHO CARES on

Add Answers or Comments

To comment on this, Sign In or Sign Up.