Number Systems Recap

What is a natural number?

• A positive number

• A positive whole number

• A positive and negative number

• A positive and negative whole number

What is an integer?

• It is a positive and negative whole number

• Is a positive and negative number

• Is a positive and negative whole number including zero

• Is a positive and negative number excluding zero

9 is a prime number?

• True

• False

What is a rational number?

4, 8, 12, 16,... are factors of 4. True or False?

• True

• False

What is 4 x -5 ?

• 20

• 9

• -20

• -9

What is 36 divided by - 6?

• 6

• -6

• 3

• -3

What is -10 - 3?

• 13

• 7

• -7

• -13

What is -13 + 2?

• -11

• 15

• -12

• -15

Which of the following is an example of an irrational number?

• 2.333

• $\sqrt{2}$

• $\frac{1}{2}$

• 2