By dzyubam
- **Mar 24**, 02:00 AM

Math (PS)
Two trains continuously travel between Washington DC and Baltimore, which is 120 miles away. They start simultaneously, train A at Washington and train B at Baltimore, and run at 30 and 90 mph respectively. The station turnaround times are negligible. What is the distance...

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By dzyubam
- **Mar 23**, 02:00 AM

Math (PS)
Foodmart customers regularly buy at least one of the following products: milk, chicken, or apples. 60% of shoppers buy milk, 50% buy chicken, and 35% buy apples. If 10% of the customers buy all 3 products, what percentage of Foodmart customers purchase exactly 2...

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

Math (DS)
and are positive integers and . What is the value of ?
1.
2. is a prime number
OA and Explanation
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By dzyubam
- **Mar 21**, 02:00 AM

Math (DS)
When is divided by 5, the remainder is 2. Is divisible by 7?
1. is a prime number
2. is a multiple of 10
OA and Explanation
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By dzyubam
- **Mar 18**, 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%
OA and Explanation
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By dzyubam
- **Mar 17**, 02:00 AM

Math (PS)
Which expression has the greatest value?
(A)
(B)
(C)
(D)
(E)
OA and Explanation
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By dzyubam
- **Mar 16**, 02:00 AM

Math (DS)
Set consists of a certain number of even integers divisible by 3. Is standard deviation of positive?
1. All elements of set are positive
2. The range of set is 0
OA and Explanation
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By dzyubam
- **Mar 15**, 02:00 AM

Math (DS)
If sets and are united into a single set, will the mean of this set be smaller than the sum of means of sets and ?
1. and are one-element sets
2. Neither set nor set contains negative...

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By dzyubam
- **Mar 14**, 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
OA and Explanation
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By dzyubam
- **Mar 11**, 02:00 AM

Math (DS)
Is the perimeter of a rectangle greater than 8 inches?
1. The diagonal of the rectangle is twice as long as its shorter side
2. The diagonal of the rectangle is 4 inches longer than its shorter side
OA and Explanation
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