1squared is 1
2 squared is 4
3 squared is 9
4 is 16
5 is 25
6 is 36
7 is 49
8 is 64
9 is 81
10 is 100
11 is 121
12 is 144
13 is 169
14 is 196
15 is 225
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225 (15 squared)256 (16 squared)289 (17 squared)324 (18 squared)
The two square numbers which add up to 13 are 9 (which is equal to 3 squared), and 4 (which is equal to 2 squared).
There are no two whole numbers which when squared sum to 62. There are infinitely may pairs of irrational numbers that when squared sum to 62, eg 1 and √61, 2 and √58
There are 15 prime numbers up to 50.
a square numbers are numbers that can be timeds by them self's. eg 2*2,4=2 squared