GRE Math

Question 1

What are the common Pythagorean Triplets?

Answer 1

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

Question 2

What is Pythagorean’s theorem?

Answer 2

a2 + b2 = c2

Question 3

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

Answer 3

1/2(base x height)

Question 4

How do you calculate the circumference of a circle?

Answer 4

2pir

Question 5

How do you calculate the area of a circle?

Answer 5

pi*r^2

Question 6

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

Answer 6

Increase Denominator, Decrease Numerator

Question 7

What is 1/100?

Answer 7

.01

Question 8

What is 1/1000?

Answer 8

.001

Question 9

What is 1/6?

Answer 9

0.16667 (repeating)

Question 10

What is 5/6?

Answer 10

0.83334 (repeating)

Question 11

What is 1/7?

Answer 11

0.143

Question 12

What is 1/8?

Answer 12

0.125

Question 13

What is 3/8?

Answer 13

0.375

Question 14

What is 5/8?

Answer 14

0.625

Question 15

What is 7/8?

Answer 15

0.875

Question 16

What is 1/9?

Answer 16

.11112 (repeating)

Question 17

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

Answer 17

Between 0 and 1.

Question 18

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

Answer 18

It is greater than 1.

Question 19

How do you divide by a fraction?

Answer 19

Multiply by the reciprocal.

Question 20

In a word problem “is” typically means?

Answer 20

Equals

Question 21

In a word problem “of” typically means

Answer 21

“multiply”

Question 22

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

Answer 22

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

Question 23

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

Answer 23

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

Question 24

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

Answer 24

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

Question 25

What is the area of an equilateral triangle?

Answer 25

Root 3 / 4 * side ^ 2

Question 26

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

Answer 26

Even.

Question 27

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

Answer 27

Odd

Question 28

Zero is even.

Question 29

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

Answer 29

Even

Question 30

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

Answer 30

Odd

Question 31

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

Answer 31

Even

Question 32

How do you use FOIL to multipy a binomial?

Answer 32

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

Question 33

What is considered 1 standard deviation away from the mean?

Answer 33

34%

Question 34

What is considered 2 standard deviations away from the mean?

Answer 34

13.5%