Prime numbers, factors and multiples test questions

1

List the prime numbers between {40} and {50}.

2

How many factors does the number {36} have?

3

List the first {4} multiples of {6}.

4

What is the {5}^{th} multiple of {3}?

5

Look at the following list of numbers:

{2},~{36},~{9},~{8},~{24}

Which number is a multiple of {18}?

6

Look at the following list of numbers:

{2},~{36},~{9},~{6},~{24}

Which number is a factor of {18}, but not a multiple of {2}?

7

Write {36} as the product of its prime factors.

8

Find the highest common factor (HCF) of {32} and {40}.

9

Find the lowest common multiple (LCM) of {32} and {40}.

10

Find the highest common factor (HCF) of {48},~{54} and {72}.