GMAT Test practice questions, page 50 of 65, with answer review and explanations.
Question 246
It costs $4 for the first 1/4 hour to use the laundry machine at the Laundromat. After the first 1/4 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
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
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 ?
11
13
17
10
7
Question 249
It takes Avery 3 hours to build a brick wall while Tom can do it in 2.5 hours. If the two start working together and after an hour Avery leaves, how much time will it take Tom to complete the wall on his own?
25 minutes.
30 minutes.
40 minutes.
55 minutes.
1 hour and 20 minutes.
Question 250
There are three foam generators in the factory, the first two can generate 14 liters of foam in one hour and the third can generate 18 liters in an hour. The three generators start working together at the same time and after one hour and a half one of the first generators stops working and two hours after that the third generator stops working and only one generator is left. If 5 hours after they all started to work the last generator stops working, how many liters of foam were generated?