QUESTION: 325

A, B, C are three consecutive positive integers (A>B>C). What is the value of the expression 2A +B +3C?

6A+7.
5A+1.
5A-1.
6A-5.
6A-7.

Answer(s): E

Explanation:

A different way is by expressing B and C according to A.
C = A –2, B = A – 1. So the expression becomes: 2A +(A-1) +3(A-2) = 6A – 7.

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QUESTION: 326

Q, R, S, and T are four consecutive positive numbers. Which of the following expressions must be odd?

QR + ST.
Q + R + S + T.
Q2 + S3.
Q2 + R2.
Q2 + 2R

Answer(s): D

Explanation:

You can ignore the powers since odds and evens remain as they were under powers. Q and R are consecutive numbers and therefore one of them is even and the other one is odd. The result of the sum of an even number and an odd number must be an odd number.

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QUESTION: 327

X, Y and Z are consecutive numbers (X>Y>Z). X +2Y +3Z = 5Y + 4. What is Z?

Answer(s): A

Explanation:

Use the answers to back solve.
X + 2Y +3Z = 5Y +4 ---> X + 3Z = 3Y +4
Let’s try the first answer: Z = 5, so Y = 6 and X = 6. Let’s check the equivalence: 7 + 15 = 22 = 18 + 4.

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QUESTION: 328

The sum of 3 consecutive numbers is definitely:

Positive.
Divisible by 2.
Divisible by 3.
Divisible by 4.
Divisible by 5.

Answer(s): C

Explanation:

This is a rule: The sum of 3 consecutive integers is divisible by 3. For example, take 3 + 4 + 5 = 12.

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Free GMAT SECTION 2: QUANTITATIVE Exam Braindumps (page: 82)

QUESTION: 325

Explanation:

QUESTION: 326

Explanation:

QUESTION: 327

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QUESTION: 328

Explanation: