GMAT Quantitative Reasoning Practice Test 1

Question : 10 of 100

Marks: +1, -0

N

is a prime number bigger than 5 . Which of the following expressions must be even?

$(N+2)^2$ .
$N^2+2$ .
$N(N+2)$ .
$(N+1)(N+2)$ .
$(N-2)^2$ .

Validate

Solution:

Answer

(N+1)(N+2)

is a multiplication of two consecutive numbers, therefore one of them must be even, and an even number multiplied by a different number is an even number.

Go to Question:

Prev Question

Next Question