By akkane
- **Jun 19**, 02:00 AM

Math (DS)
If , what is ?
1. is an integer
2. is an integer
Question Discussion & Explanation
Correct Answer - E - (click and drag your mouse to see the answer)
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By akkane
- **Jun 15**, 02:00 AM

Math (DS)
grams of water were added to 80 grams of a strong solution of acid. If 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?
1.
2....

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By Magoosh
- **Jun 12**, 09:00 AM

Fact: If you have two variables and only one equation, in general you will not be able to solve for the individual values of the variables. You need two separate equations in order to solve for the individual values of each of two variables. (This...

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By akkane
- **Jun 12**, 02:00 AM

Math (DS)
At what angle do the lines and intersect?
1.
2.
Question Discussion & Explanation
Correct Answer - A - (click and drag your mouse to see the answer)
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By Magoosh
- **Jun 8**, 09:00 AM

Understand the properties of the GMAT Quantitative section’s two favorite triangles!
The two special triangles are right triangles with special angles and side. Like all right triangles, they satisfy the Pythagorean Theorem. These two triangles are “special” because, with just a couple pieces of information, we can figure out...

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By akkane
- **Jun 8**, 02:00 AM

Math (DS)
Is
Question Discussion & Explanation
Correct Answer - E - (click and drag your mouse to see the answer)
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By akkane
- **Jun 7**, 02:00 AM

Math (DS)
Water evaporates at the rate of two liters per hour per one square meter of surface. How long will it take to evaporate 30 liters of water from a swimming pool full of water with vertical walls and a flat bottom that holds 56...

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By Magoosh
- **Jun 4**, 09:00 AM

The 45º angle
Fact: All lines with slopes of 1 make 45º angles with both the x- and y-axes.
Conversely, if a line makes a 45º angles with either the x- of y-axes, you know immediately its slope must be . This first fact is true, not only...

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By Magoosh
- **May 31**, 09:00 AM

You may remember this formula, one of the sleekest factoring tricks in all of algebra:
This formula, called “the difference of two squares” formula, is a favorite of standardized test writers. A simple enough pattern: see if you can detect where it shows up in the...

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By akkane
- **May 31**, 02:00 AM

Math (DS)
If is a positive integer, is \sqrt{x} < 2.5x - 5[/latex] ?
1. [latex]x < 3[/latex]
2. [latex]x[/latex] is a prime number
Question Discussion & Explanation
Correct Answer - A - (click and drag your mouse to see the answer)
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