The first nine positive integer square numbers are:
1 - 1
2 - 4
3 - 9
4 - 16
5 - 25
6 - 36
7 - 49
8 - 64
9 - 81
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The first 5 square numbers are 1, 4, 9, 16, and 25.
The 1st 3 square numbers are 1 (1x1), 4 (2x2) and 9 (3x3)
The first 4 square numbers are 1^2, 2^2, 3^2, and 4^2, which are 1, 4, 9, and 16, respectively. To find the sum of these numbers, you simply add them together: 1 + 4 + 9 + 16 = 30. Therefore, the sum of the first 4 square numbers is 30.
1 and 9 are square numbers.
36 details: the numbers are 1,2,3 the squares 1, 4, 9 the produc 1 x 4 x 9 = 36