ANSWERS: 2
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2 squared + 3 = 7 4 squared = 3 = 19 Even numbers squared + 3 = odd
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He says that because all prime numbers are odd, except two, the only even number that can be divide by 1 and itself only. So, if you use an even number, like 2, the result will be an odd number (2x2=4 -- 4+3=7)
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