We have a scale and 7 balls. 1 ball is heavier than all the
rest. How to determine the heaviest ball with only 3
possible weighing attempts?
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Answer Posted / subir
(Step-1)Divide the balls into 2 groups of 3 each, and weigh
them. If they weigh same, then the 7th ball outside is the
heaviest.
(Step-2) If not then,
one of the 3 balls group being weighed is heavier. Take
them down and consider the heavier group, with one ball on
each side of the balance.
(Step-3)if they measure unequal, then the heavier one is
detected, and if they measure equal then the one outside is
heavier.
| Is This Answer Correct ? | 65 Yes | 5 No |
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