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Interview Question for Senior Member of Technical Staff at VMware:
Jan 25, 2010
given 8 coins and one of them heavier than the others, how many weighings will be needed to find the odd one ?
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Aug 5, 2011
One weighing.
Place four coins in each pan. Take two off at a time until the scale balances. The heavier coin will be in the hand of the pan that ascends.
Place four coins in each pan. Take two off at a time until the scale balances. The heavier coin will be in the hand of the pan that ascends.
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3 of 3 people found this helpful
by Anonymous:
separate into three groups (3,3,2)
put three on each side of scale, if sides balance then place two remaining coins on either side of scale to see which is heavier. If sides don't balance, take two coins from the heavier side and put on the scale to see if one is heavier, if they balance, the one you took off is the heaviest.