By Miranda Menestrina
- **Feb 21**, 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 Miranda Menestrina
- **Feb 20**, 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 Miranda Menestrina
- **Feb 19**, 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 Miranda Menestrina
- **Feb 18**, 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 Miranda Menestrina
- **Feb 17**, 02:00 AM

Math (DS)
On the picture above, is the area of the triangle greater than 1?
1.
2. Perimeter of the triangle is greater than
Question Discussion & Explanation
Correct Answer - A - (click and drag your mouse to see...

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By Miranda Menestrina
- **Feb 14**, 02:00 AM

Math (DS)
The vertices of a triangle have coordinates , , and where and . What is the area of the triangle?
1.
2. Angle at the vertex = angle at the vertex
Question...

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By Miranda Menestrina
- **Feb 13**, 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 Miranda Menestrina
- **Feb 12**, 02:00 AM

Math (PS)
If and , which of the following must be true, assuming ?
(A)
(B)
(C)
(D)
(E)
Question Discussion & Explanation
Correct Answer - С - (click and drag your mouse to see the answer)
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By Miranda Menestrina
- **Feb 11**, 02:00 AM

Math (PS)
Water flows into an empty tank of 54 liters via 12 small pipes. The rate of each pipe is 1 liter per hour. However, water flows out of the tank via several big pipes at the rate of 1.5 liter per hour. If after...

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By Miranda Menestrina
- **Feb 10**, 02:00 AM

Math (DS)
Is integer even?
1.
2.
Question Discussion & Explanation
Correct Answer - E - (click and drag your mouse to see the answer)
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