Number Theory Review

Question 1

Find the number below that is NOT composite.

Accepted Answer

29

Question 2

Any number that can be multiplied with another number to get an answer is called a:

Accepted Answer

factor

Question 3

What set of numbers will always end in either 5 or 0?

Accepted Answer

multiples of 5

Question 4

Lists of numbers that you get when "counting by" or "multiplying by" a certain number are:

Accepted Answer

multiples

Question 5

What kind of number will always end in either a 2, 4, 6, 8, or 0?

Accepted Answer

even number

Question 6

Find the number below that is NOT a prime number.

Accepted Answer

9

Question 7

All even numbers (except 2) are composite numbers. True or false?

Accepted Answer

True

Question 8

If a number has a digital root of 3, 6 or 9 it must be a

Accepted Answer

multiple of 3

Question 9

What is the ONLY way you can get an ODD answer when multiplying?

Accepted Answer

odd x odd

Question 10

When adding an EVEN number to another EVEN number, what kind of answer will you get?

Accepted Answer

even

Questions 10