QUESTION: 245

It takes Tanya 50 minutes to drive to the country club. If the average speed of the entire round trip to the club is 87.5% of the average speed on the way to the club, how many minutes approximately will it take Tanya to drive home from the country club?

42 minutes.
48 minutes.
52 minutes.
54 minutes.
66 minutes.

Answer(s): C

Explanation:

Define X as the average speed to the country club and Y as the average speed on the way back.
The average speed of the entire round trip to the club is 87.5% of the average speed on the way to the club: (X
+ Y)/2 = 0.875X X + Y = 1.75X □ Y = 0.75X.
The average speed on the way back is 75% of the speed to the club.
If the time it takes her to get to the country is T, then T/0.75 is the time it will take to get back home. 50/0.75 = approximately 66 minutes.

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QUESTION: 246

It costs $4 for the first ¼ hour to use the laundry machine at the Laundromat. After the first ¼ hour it costs $12 per hour. If a certain customer uses the laundry machine for 3 hours and 25 minutes, how much will it cost him?

$25.
$32.
$36.
$40.
$42.

Answer(s): E

Explanation:

The customer uses the machine for 3 hours and 25 minutes. The first 15 minutes cost him $4 and he has 3 hours and 10 minutes left, which is (12 x 3 = $36) + 10 minutes.
10 minutes are 1/6 of an hour, which is (1/6 x 12 = $2). The total cost will be: 4 + 36 + 2 = $42.

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QUESTION: 247

The mall charges 50 cents for the first hour of parking and $3 for each additional hour until the customer reaches 4 hours, after that the parking fee is $1 per hour. If a certain customer parked his in the mall for 7 hours and 30 minutes, how much is he going to pay?

$11.5.
$12.
$13.
$14.5.
$15.

Answer(s): C

Explanation:

The customer parked for 7 hours and 30 minutes. Divide the problem into parts: The first hour cost him 0.5 dollars. He has 6.5 hours left.
The next three hours cost him 3 dollars per hour, $9 in total for that time.
He has (7.5 – 4 = 3.5 hours left) at a wage of $1 per hour, it sums up to 3.5 additional dollars. Sum it all up: 0.5 + 9 + 3.5 = $13.

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QUESTION: 248

If ( 0 < X < Y ), X is an odd number and Y is a prime number, which of the following can be the value of X + Y ?

Answer(s): D

Explanation:

Every prime number except 2 is an odd number. If Y = 2, than X must have been 1 because X is smaller than Y but this answer doesn’t appear among the answers and therefore Y is odd.
If X and Y are both odd numbers, their sum must be an even number. The only even answer is D.

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Free GMAT SECTION 2: QUANTITATIVE Exam Braindumps (page: 62)

QUESTION: 245

Explanation:

QUESTION: 246

Explanation:

QUESTION: 247

Explanation:

QUESTION: 248

Explanation: