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

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By Jeff
- **Mar 18**, 02:00 AM

Math
Each shelf of a bookcase contained 12 books. If the librarian took out 21 books and rearranged the remaining books so that all shelves but the last one contained 8 books and that last shelf contained 11 books, how many shelves does the bookcase have?
A....

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

Math
What is 987 * 987?
A. 974,169
B. 974,219
C. 974,549
D. 975,019
E. 975,369
Question Discussion & Explanation
Correct Answer - A - (click and drag your mouse to see the answer)
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By Jeff
- **Mar 16**, 02:00 AM

Math
In the morning, John drove to his mother's house in the village at an average speed of 60 kilometers per hour. When he was going back to town in the evening, he drove more cautiously and his speed was lower. If John went the same...

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

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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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