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Odd and Even Numbers

If a and b ar...

Question

If a and b are odd numbers, then which of the following is even?

a + b

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a + b + 1

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a b

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a b + 2

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Solution

The correct option is A $a + b$
$\Rightarrow$ $a$ and $b$ are two odd numbers.
$\Rightarrow$ We know that sum of the odd numbers is even number.
$∴$ $a + b$ is an even number.

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