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. \angle ABC < 90^\circ[/latex]
2. Perimeter of the triangle [latex]ABC[/latex] is greater than [latex]\frac{4}{a}[/latex]
Question Discussion & Explanation
Correct Answer - A - (click and drag your...

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

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

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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
(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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By Miranda Menestrina
- **Feb 7**, 02:00 AM

Math (PS)
If a portion of a half water/half alcohol mix is replaced with 25% alcohol solution, resulting in a 30% alcohol solution, what percentage of the original alcohol was replaced?
(A) 3%
(B) 20%
(C) 66%
(D) 75%
(E) 80%
Question Discussion & Explanation
Correct Answer - E - (click and drag...

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By Miranda Menestrina
- **Feb 6**, 02:00 AM

Math (PS)
In preparation for the Olympics, a group of five women is participating in a 400 meter race. What is the probability that either Jenny or Sally will win this race?
(A)
(B)
(C)
(D)
(E)
Question Discussion & Explanation
Correct Answer - C - (click and...

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By Miranda Menestrina
- **Feb 5**, 02:00 AM

Math (PS)
A luxury liner, Queen Marry II, is transporting several cats as well as the crew (sailors, a cook, and one-legged captain) to a nearby port. Altogether, these passengers have 15 heads and 41 legs. How many cats does the ship host?
(A) 3
(B) 5
(C) 6
(D)...

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