QUESTION: 293

A GMAT class has a ratio of girls to boys of 1.5 to 3. If the class has a total of 36 students, how many more girls are there than boys?

Answer(s): C

Explanation:

This is a standard ratio problem. 36 / (1.5 + 3) = 8. The number of boys is 8 x 3 = 24.
The number of girls is 8 x 1.5 = 12.
The difference between the numbers is 12.

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A Math-club class has a ratio of girls to boys of 1.5 to 4.5. Out of all the boys 16.66% are left-handed, how many left-handed boys are there in the class assuming that there are 24 students all together.

Answer(s): E

Explanation:

This is a standard ratio problem. 24 / (1.5 + 4.5) = 4. The number of boys is 4 x 4.5 = 18.
The number of girls is 4 x 1.5 = 6. 16.66% out of 18 are 3 boys.

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QUESTION: 295

X is an even number, which of the following is odd?

X2
(X +1) 2
(X+2) 2
X3 + X
2X2

Answer(s): B

Explanation:

The easiest way is to try out a number, lets say X=2.
You can see that B is 9, and that is always an odd number.

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QUESTION: 296

X is an integer, which of the following must be even?

X (X +2) + 2
X (X +1) +1
X (X + 1)
X2
X3 +1

Answer(s): C

Explanation:

You don’t know whether or not X is even. In answer C you have a multiplication of two consecutive numbers so one of them must be even and an even number multiplied by an odd number is always even.

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Free GMAT SECTION 2: QUANTITATIVE Exam Braindumps (page: 74)

QUESTION: 293

Explanation:

QUESTION: 294

Explanation:

QUESTION: 295

Explanation:

QUESTION: 296

Explanation: