By Jeff
- **Mar 14**, 02:00 AM

Math
All pages of a book are numbered. If the first page is numbered 1 and the last page is numbered 705, on how many pages does digit 9 appear in the numeration?
A. 70
B. 77
C. 126
D. 133
E. 140
Question Discussion & Explanation
Correct Answer - D - (click and drag...

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By Jeff
- **Mar 11**, 02:00 AM

Math
If the power of an engine grows by 10% when the number of its cylinders is increased by one, which of the following is closest to the ratio of the power of a 9-cylinder engine to that of a 12-cylinder engine?
A. 0.69
B. 0.71
C. 0.72
D. 0.75
E....

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By Jeff
- **Mar 10**, 02:00 AM

Math
A bowl contains green and blue chips only. If two chips are drawn from the bowl (without replacement) what is the probability that both chips will be blue?
(1) The ratio of blue chips to green chips is 3:4.
(2) There are 5 more green chips than...

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By Jeff
- **Mar 9**, 02:00 AM

Math
A wholesaler sells computers on following conditions: the first 100 computers cost $500 each and each computer above 100th costs $400. If the wholesaler received $57,600 as a result of the deal, how many computers did he sell?
A. 109
B. 117
C. 119
D. 121
E. 123
Question Discussion &...

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By Jeff
- **Mar 8**, 02:00 AM

Math
The train consists of 6 carriages, 20 meters long each. The gap between the carriages is 1 meter. If the train is moving at a constant speed of 60 km/h, how much time will it take the train to run through a 1 kilometer tunnel?
A....

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By Jeff
- **Mar 7**, 02:00 AM

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

Math
It takes Jack 2 more hours than Tom to type 20 pages. If working together, Jack and Tom can type 25 pages in 3 hours, how long will it take Jack to type 40 pages?
A. 5 hours
B. 6 hours
C. 8 hours
D. 10 hours
E. 12 hours
Question...

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By Jeff
- **Mar 3**, 02:00 AM

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

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

Math
At 12:00 in the afternoon Paul stopped at the gas station and filled his car's 50-liter tank to capacity. After Paul drove 75 miles away from the station, the tank developed a leak and the car started to lose 1515 liters of fuel per minute....

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