By Miranda Menestrina
- **Oct 21**, 02:00 AM

Math
How many odd three-digit integers greater than 800 are there such that all their digits are different?
A. 40
B. 60
C. 72
D. 81
E. 104
Question Discussion & Explanation
Correct Answer - C - (click and drag your mouse to see the answer)
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By Miranda Menestrina
- **Oct 20**, 02:00 AM

Math
If equation encloses a certain region on the coordinate plane, what is the area of this region?
A. 20
B. 50
C. 100
D. 200
E. 400
Question Discussion & Explanation
Correct Answer - D - (click and drag your mouse to see...

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By Miranda Menestrina
- **Oct 17**, 02:00 AM

Math
The ratio of the number of employees of three companies X, Y and Z is 3:4:8, respectively. Is the average age of all employees in these companies less than 40 years?
(1) The total age of all the employees in these companies is 600.
(2) The...

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By Miranda Menestrina
- **Oct 16**, 02:00 AM

Math
Two sets are defined as follows:

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By Miranda Menestrina
- **Oct 15**, 02:00 AM

Math
Jack can complete the task in 8 hours. Tom can complete the same task in 12 hours. If Jack works on the task alone for 4 hours and then Tom starts to help him, how many hours in total will Jack have worked by the...

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By Miranda Menestrina
- **Oct 13**, 02:00 AM

Math (DS)
Between 12:24 and 14:36 the hour hand of the clock turns by
A. 60 degrees
B. 66 degrees
C. 72 degrees
D. 74 degrees
E. 76 degrees
Question Discussion & Explanation
Correct Answer - B - (click and drag your mouse to see the answer)
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By Miranda Menestrina
- **Oct 9**, 02:00 AM

Math (PS)
A draining pipe can empty a pool in 4 hours. On a rainy day, when the pool is full, the draining pipe is opened and the pool is emptied in 6 hours. If rain inflow into the pool is 3 liters per hour, what...

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By Miranda Menestrina
- **Oct 8**, 02:00 AM

Math (DS)
A sphere is inscribed in a cube with an edge of centimeters. In terms of x what is the shortest possible distance from one of the vertices of the cube to the surface of the sphere?
A.
B....

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