There are 11 square numbers between 0 an 100
0^2 = 0
1^2 = 1
2^2 = 4
3^2 = 9
4^2 = 16
5^2 = 25
6^2 = 36
7^2 = 49
8^2 = 64
9^2 = 81
10^2 = 100
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No square number is a prime number, since it has the number you squared as a factor. There are several square numbers less than 100. Just calculate the squares of all numbers, starting with 1, until you reach or pass 100. Then stop.
87 is the only 2-digit number that is 6 greater and 13 less than a square, but it is not prime.
0, 1 and 64
there is no number less than 49 between 1 and 100 that if multiplied by 2 will have a 3-digit product no number less than 50, actually
An even square number that is less than 100 is 64. It is the square of 8 (8 x 8 = 64) and meets the criteria of being both even and below 100. Other even square numbers under 100 include 4 (2 x 2) and 16 (4 x 4), but 64 is the largest.