By akkane
- **Mar 25**, 02:00 AM

Math (PS)
A 4 cm cube is cut into 1 cm cubes. What is the percentage increase in the surface area after such cutting?
(A) 4%
(B) 166%
(C) 266%
(D) 300%
(E) 400%
Question Discussion & Explanation
Correct Answer - D - (click and drag your mouse to see the answer)
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By akkane
- **Mar 22**, 02:00 AM

Math (PS)
Which expression has the greatest value?
(A)
(B)
(C)
(D)
(E)
Question Discussion & Explanation
Correct Answer - C - (click and drag your mouse to see the answer)
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By akkane
- **Mar 19**, 02:00 AM

Math (PS)
If is a positive integer, is defined as the number of positive integers which are less than and do not have common factor with other than 1. If is prime then
(A)
(B)
(C)
(D)
(E) 2
Question Discussion &...

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

Math (PS)
A basket contains 3 blue marbles, 3 red marbles, and 3 yellow marbles. If 3 marbles are extracted from the basket at random, what is the probability that a marble of each color is among the extracted?
(A)
(B)
(C)
(D)
(E)
Question Discussion &...

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

Math (PS)
During the break of a football match the coach will make 3 substitutions. If the team consists of 11 players among which there are 2 forwards, what is the probability that none of the forwards will be substituted?
(A)
(B)
(C)
(D)
(E)
Question Discussion...

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By akkane
- **Mar 6**, 02:00 AM

Math (PS)
How many real roots does this equation have?
(A) 0
(B) 1
(C) 2
(D) 3
(E) 4
Question Discussion & Explanation
Correct Answer - A - (click and drag your mouse to see the answer)
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By akkane
- **Mar 5**, 02:00 AM

Math (PS)
Function is defined as follows:
if is positive or 0 then ;
if is negative then .
Which of the following is true about ?
I.
II.
III.
(A) I only
(B) II only
(C) III only
(D) I and III only
(E) not I, II, or III
Question Discussion...

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By akkane
- **Mar 4**, 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
Question Discussion & Explanation
Correct Answer - C - (click and drag your mouse to see the answer)
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By akkane
- **Feb 27**, 02:00 AM

Math (PS)
A smith received an order to make a 1 million liter cube-shaped tank (note that 1 cubic meter = 1,000 liters of water). If he has only 4 meter by 2 meter sheets of metal that can be cut, how many metal sheets will...

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By akkane
- **Feb 26**, 02:00 AM

Math (PS)
If and , which of the following must be true, assuming
(C)
(D)
(E)
Question Discussion & Explanation
Correct Answer - С - (click and drag your mouse to see the answer)
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