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Math students are often taught that a prime number is sometimes described as 'a number that has only two factors - 1 and itself'.

Try this Algebra quiz all about prime numbers to see if you understand what that really means.

1.

Which of these is not a prime number?

13

15

17

19

2.

Is there an easy way to work out which numbers are prime?

Yes

No

Sometimes

Only if you are a genius

Unfortunately you have to either learn the numbers or work them out

3.

Is the number 14 a prime number?

Yes

No

Yes, because it is divisible by 2

It depends which way you look at it

There are four factors of 14 - the numbers 1, 2, 7 and 14. Because there are more than two factors, it cannot be a prime number

4.

Is the number 1 a prime number?

Yes, because it is a positive whole number

No

Sometimes

Yes, because it is only divisible by itself and 1

The number 1 has only one factor - itself. Remember the rule, a prime number has TWO factors itself AND 1

5.

The number 24 has eight factors. Seven of the factors are 1, 2, 3, 4, 6, 12 and 24. What is the missing factor?

5

8

10

14

All the numbers given (along with the correct answer, 8) can be divided into 24 with the result that the answer is a whole number

6.

Which of these numbers is a prime number?

4

7

9

12

All the incorrect answers have three or more factors

7.

What is the next prime number after 97?

98

99

100

101

1 and 101 are the only factors of 101 and therefore it is a prime number

8.

Which of these is a prime number?

33

35

37

39

9.

The word 'prime' is an abbreviation for what?

Primary

Primative

Priority

It is not an abbreviation

Prime is a word in its own right

10.

What is the next prime number after 43?

44

45

46

47