odd
even ends 0 2 4 6 8
odd ends 1 3 5 7 9
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It is an odd number because it is not divisible by 2 evenly
83 is not divisible by 2, so it is odd. 83 is not divisible by any other numbers except 1 and 83, so it is prime.
The 42nd odd number is 83.
Yes it would Even + even = even Even + odd = odd Odd + odd = even
because that's the theory of maths even x even = even even x odd = odd even + even = even even + odd = odd