If x and y are both odd integers, which of the following numbers must be an even integer?

A x² + y -1

B xy + y²

C x+y+1

D xy + 2

E none of these

Solution

Correct Answer: Option B

xy + y²:

বিজোড় × বিজোড় = বিজোড় (xy)
y² সবসময় বিজোড় হবে যেহেতু y বিজোড়
বিজোড় + বিজোড় = জোড়

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