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March 28, 2015

March 28, 2015

Posted by **James101** on Thursday, August 21, 2008 at 3:48am.

- urgent maths -
**drwls**, Thursday, August 21, 2008 at 7:24amThe possible digit sums, for five-digit numbers, ranges from 1 (for 10000) to 45 (for 99999) That makes 45 possibilities. With 90 numbers selected, the least possible number of times any sum occurs is two, when each sum occurs twice. When you pick a 91st number, it has to be a third time for one of them.

- urgent maths -
**molly**, Thursday, August 21, 2008 at 10:17am12

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