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what is the smallest whole number that can be written two ways as a sum of two different perfect squares? i.e.11squared plus 3 squared is 121+ 9=130 and7 squared + 9squared=49 +81= 130. Are there any smaller? I am stumped! Thanks ! Hi, Just write down the squares up to 121: 1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121.
Then you look at a sum of two of them and see if you
can get it as a sum of two others:
1+4 = 5 but you cannot get 5 in any other way.
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