there are an infinite amount of square numbers 4,9,16,25,36,49,64,81,100... A square number is a number multiplied by its self. For example 6 times 6 is 36 so 36 is a square number
To Help just add the odd 2 times tables to get each square number.
For example: 1=1
1+3=4
1+3+5= 9
1+3+5+7-= 16
1+3+5+7+9= 15
11 12 13 14 15 16 17 18 19 20
carrying on from 100... 121,144,169,196,225, 256, 289, 324, 361, 400!
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