Q96 of 100 Page 312

Challenge Write an expression for the sum of 1 and twice a number n. If you let n be any odd number, will the result always be an odd number?

1+2n

now if n is odd


then yes the expression will always be odd


because 2n will always be even. (even if n is odd or even)


so even plus 1 will always be odd.


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