By Jeff
- **Jul 5**, 02:00 AM

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By Jeff
- **Jul 4**, 02:00 AM

Math
Working at their normal constant rates, 20 diggers can dig a 100-meter long trench in hard soil in 3 days. A construction company ordered the diggers to dig a 180-meter long trench in soft soil. If diggers can work 20% faster in soft soil than...

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By Jeff
- **Jul 1**, 02:00 AM

Math
A. 1.0
B. 1.7
C. 2.0
D. 2.4
E. 3.0
Question Discussion & Explanation
Correct Answer - C - (click and drag your mouse to see the answer)
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There's still a little...

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By Jeff
- **Jun 30**, 02:00 AM

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By Jeff
- **Jun 29**, 02:00 AM

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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....

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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)
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Manhattan GMAT: 99...

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

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

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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....

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