1.

Express 225 as the sum of 15 on number.

Answer»

225 = 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19 + 21 + 23 + 25 + 27 + 29

This can easy be find that given x2 ,we can analyse that first x odd numbers sum is 225 .



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