49 is an odd number numbers ending in 1,3,5,7,9 are odd.
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Odd. Even + Even = Even Odd + Odd = Even Odd + Even = Even + Odd = Odd
49
49 of them. ' 2 ' is the only even prime number.
If you are multiplying by integers, only half of them. Odd times odd is odd. Odd times even is even. Here are the products of seven and the first 10 integers (1 thru 10): 7, 14, 21, 28, 35, 42, 49, 56, 63, 70 Every other number is odd and every other number is even, depending on where you start.
odd * odd = odd answer even * even = even answer odd * even = even answer