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

Math (PS)
If function satisfies for all , which of the following must be true?
(A)
(B)
(C)
(D)
(E)
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By dzyubam
- **Jul 1**, 02:00 AM

Math (PS)
How many odd three-digit integers greater than 800 are there such that all their digits are different?
(A) 40
(B) 56
(C) 72
(D) 81
(E) 104
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By dzyubam
- **Jun 30**, 02:00 AM

Math (PS)
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
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By dzyubam
- **Jun 29**, 02:00 AM

Math (PS)
Jack can complete the task in 8 hours. Tom can complete the 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 dzyubam
- **Jun 28**, 03:45 AM

Math (DS)
grams of water were added to the 80 grams of a strong solution of acid. As a result, the concentration of acid in the solution became times of the initial concentration. What was the concentration of acid in the original solution?
...

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By dzyubam
- **Jun 27**, 02:00 AM

Math (DS)
A rectangle is inscribed in a circle of radius 5. Is the area of the rectangle bigger than 48 ?
1. The ratio of the lengths of sides of the rectangle is 3:4
2. The difference between the lengths of sides of the rectangle is smaller...

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By dzyubam
- **Jun 24**, 03:30 AM

Math (PS)
How many integers between 18 and 70 inclusive are divisible by either 7 or 9 but not both?
(A) 11
(B) 12
(C) 13
(D) 14
(E) 15
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By dzyubam
- **Jun 23**, 02:00 AM

Math (PS)
After M students took the test, there was a total of 64% of correct answers. If the test contains 50 questions, what is the least number of questions that the next student have to get right to bring the total of correct answers to...

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By dzyubam
- **Jun 22**, 02:00 AM

Math (PS)
How many three-digit integers are not divisible by 3 ?
(A) 599
(B) 600
(C) 601
(D) 602
(E) 603
OA and Explanation
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By dzyubam
- **Jun 21**, 02:00 AM

Math (PS)
If 10 dollars are equivalent to 24 francs and 12 pounds are equivalent to 36 francs, what is the pound equivalent of 95 dollars?
(A) 58
(B) 64
(C) 68
(D) 76
(E) 82
OA and Explanation
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