Real Number System

Question 1

Real Numbers

Answer 1

All numbers

Question 2

Irrational Numbers

Answer 2

Decimals that never end, and have no repeating pattern. Ex. Pi

Question 3

Rational Numbers

Answer 3

All fractions or decimals that end or have a repeating pattern. Ex. .4, .545454, 1/3

Question 4

Integers

Answer 4

All negative and positive numbers including 0 (Ex. -2, -1, 0, 1, 2)

Question 5

Whole Numbers

Answer 5

All numbers 0 and up (0, 1, 2, 3…)

Question 6

Natural Numbers

Answer 6

All numbers 1 and up (1, 2, 3…)

Question 7

Open Set

Answer 7

If you perform an operation within a set, you get a number outside the set. Ex. Odd numbers: 3+7=10

Question 8

Closed Set

Answer 8

If you perform an operation within a set, you can only get the number in that set. Ex. Subtraction within Integers: -3+3=0