By Jeff
- **Jun 28**, 02:00 AM

Math
One filter decreases the concentration of harmful substances in water by half. If water that contains less than 0.1 percent of harmful substances is considered clean, how many filters are required to clean 200 liters of water containing 0.5 liters of harmful substances ?
A. 2
B....

Read More

By Jeff
- **Jun 27**, 02:00 AM

Math
If set consists of all positive two-digit integers divisible by 3, what is the mean of ?
A. 52.0
B. 54.0
C. 54.5
D. 55.5
E. 56.0
Question Discussion & Explanation
Correct Answer - D - (click and drag your mouse to see the answer)
GMAT Daily Deals
Manhattan GMAT: 99...

Read More

By Jeff
- **Jun 24**, 02:00 AM

Read More

By Jeff
- **Jun 23**, 02:00 AM

Read More

By Jeff
- **Jun 22**, 02:00 AM

Math
Tub A and tub B contain 540 liters of water each. Every minute tub A loses 25 liters of water while tub B loses 15 liters. If in XXminutes tub B will contain 6 times as much water as tub A, what is XX?
A. 15
B....

Read More

By Jeff
- **Jun 21**, 02:00 AM

Read More

By Jeff
- **Jun 20**, 02:00 AM

Read More

By Jeff
- **Jun 17**, 02:00 AM

Math
There are six cards bearing numbers 2, 4, 5, 5, 5, 6. If two cards are randomly selected from the lot, what is the probability that the positive difference between the numbers on these cards is 3 or less?
A.
B.
C....

Read More

By Jeff
- **Jun 16**, 02:00 AM

Read More

By Jeff
- **Jun 15**, 02:00 AM

Math
Two sacks together contained 40 kilograms of sugar. If after 1 kilogram of sugar was taken from the first sack and poured into the second the weight of the sugar in the first sack became 60% the weight of the sugar in the second, what...

Read More