An odd number squared would always equal an odd number and an even number squared would always equal an even
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An odd number.
because that's the theory of maths even x even = even even x odd = odd even + even = even even + odd = odd
That's just math, buddy
21+9=20
it would be even. for example 2 times 3 equals 6 and 11 times 20 equals 220 so it would be even