Question

There are 6561 balls out of them 1 is heavy.Find the min. No. Of times the balls have to be weighed for finding out the haevy ball.

Answer 1

Answer:

7 times

Step-by-step explanation:

total 6561 balls

1. make 3 equal group

of 2187 ball each

weigh any 2 if any one is heavier take that group if both r equal then take 3 rd group

similary make three group of 2187 balls of choosen group

2.    729 ball each

agin weigh 2 groups and find heavy group

3.  243 ball group

4.  81 balls

5.  27 Ball

6.   9 Balls

7.    3 Balls