GMAT Practice Question Set #13 (Question 37-39)

Problem Solving Question #37: Even Expression  
Time 0 0 : 0 0 : 0 0

The expression ab+a is odd when the a and b are integers. Which of the following expressions
must be even?

(A)

a

(B)

b

(C)

a + b

(D)

ab - a

(E)

a + b2

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