By Jeff
- **Jun 2**, 02:00 AM

Math
A 400-meter runner spent 4 more seconds on the first half of the distance than he did on the second. If the runner finished the 400-meter distance in 50 seconds, what was his average speed for the first 200 meters?
A.
B.

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

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By Jeff
- **May 31**, 02:00 AM

Math
Andrew and Stephen drive on the highway in the same direction at respective rates of 72 and 80 kmh. If Stephen is 4 km behind Andrew, by how much does he have to increase his speed to catch up with Andrew in 20 minutes?
A. 1...

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

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

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By Jeff
- **May 26**, 02:00 AM

Math
Half of the company's employees work in manufacturing. If 20% of the employees who do not work in manufacturing are women, what percent of the company's employees are men?
(1) 50% of the company's male employees work in manufacturing.
(2) 20% of the company's employees who work...

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By Jeff
- **May 25**, 02:00 AM

Math
Set consists of positive numbers. If -1 is added as an element to set , which of the following is [u]NOT[/u] possible?
A. The mean will decrease but median will not change.
B. The median will decrease but mean will not change.
C....

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

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

Math
The average grade of students in group 1 is 4.0 while that of students in group 2 is 3.0. If the groups were merged into one big group, what would be the average grade in this group?
(1) There are twice as many students in group...

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

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