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GRE Vocab > GRE Math > Flashcards

GRE Math Flashcards

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1
Q

What are the common Pythagorean Triplets?

A

3,4,5
5,12,13
7,24,25
8,15,17

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2
Q

What is Pythagorean’s theorem?

A

a2 + b2 = c2

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3
Q

What is the formula for finding the area of a triangle?

A

1/2(base x height)

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4
Q

How do you calculate the circumference of a circle?

A

2pir

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5
Q

How do you calculate the area of a circle?

A

pi*r^2

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6
Q

What can you do to the numerator and denominator to make a fraction smaller?

A

Increase Denominator, Decrease Numerator

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7
Q

What is 1/100?

A

.01

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8
Q

What is 1/1000?

A

.001

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9
Q

What is 1/6?

A

0.16667 (repeating)

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10
Q

What is 5/6?

A

0.83334 (repeating)

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11
Q

What is 1/7?

A

0.143

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12
Q

What is 1/8?

A

0.125

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13
Q

What is 3/8?

A

0.375

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14
Q

What is 5/8?

A

0.625

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15
Q

What is 7/8?

A

0.875

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16
Q

What is 1/9?

A

.11112 (repeating)

17
Q

If a number is bigger than 1, its reciprocal will fall where on the number line?

A

Between 0 and 1.

18
Q

If a number is between 0 and 1, where will its reciprocal fall on the number line?

A

It is greater than 1.

19
Q

How do you divide by a fraction?

A

Multiply by the reciprocal.

20
Q

In a word problem “is” typically means?

A

Equals

21
Q

In a word problem “of” typically means

A

“multiply”

22
Q

What are all the prime #’s less than 20?

A

2, 3, 5, 7, 11, 13, 17, 19

23
Q

What are the prime #’s between 20 and 60?

A

23, 29, 31, 37, 41, 43, 47, 53, 59

24
Q

How do you check whether a number less than 100 is prime?

A

Check to see if it is divisible by 2, 3, 5, and 7.

25
Q

What is the area of an equilateral triangle?

A

Root 3 / 4 * side ^ 2

26
Q

When you add or subtract two even or two odd numbers, is the answer even or odd?

A

Even.

27
Q

When you add or subtract an even and an odd number, is the result even or odd?

A

Odd

28
Q

Zero is even.

A
29
Q

When you multiply two even numbers, is the result even or odd?

A

Even

30
Q

When you multiply two odd numbers, is the result even or odd?

A

Odd

31
Q

When you multiply an even and an odd number, is the result even or odd?

A

Even

32
Q

How do you use FOIL to multipy a binomial?

A

Take the First, Outer, Inner, and Last pairings, and add them together.

33
Q

What is considered 1 standard deviation away from the mean?

A

34%

34
Q

What is considered 2 standard deviations away from the mean?

A

13.5%

GRE Vocab (5 decks)

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