Question

there are 27 identical balls in that one of the balls is overweight there are only three chances to way in the weighing machine .How to find overweight balls

Answer 1

Answer:

Make 3 groups of 9 balls

and find the heavy group

out of that 9 balls make 3 groups of 3 balls and find the heavy one

now out of 3 balls left we can choose the heavy one

Answer 2

Make 9 groups of balls each containing 3 balls. Out of them find the heavier group. Now weigh each ball separately and find the heavy one.