Answers

2015-01-13T07:13:15+05:30
6 if it becomes lower than that

i.e 5 then 4+3+2 only makes 9 adding upto 14 since we want 15 we need atleast 6 coins in the largest pile
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2015-01-20T00:04:20+05:30
6 if we go on piling.. 1st pile will have 2 pennies.. 2nd pile 3 pennies... 3rd pile 4 pennies and 4th pile 5 pennies....but only 14 pennies are utilized.... 1 is remaining so that remaining on we can place it on 4th pile ..making it a pile of 6 pennies and the largest..
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