KS3 algebra prime numbers - numbers with only two factors

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Maths Quiz - Level 5-6 Algebra - Prime Numbers (Questions)

In KS3 Maths, you'll encounter different types of numbers like integers, natural numbers, fractions, and even letters used in algebra. One special group you'll meet is the prime numbers.

So, what's a prime number? It's a whole number with exactly two factors - just itself and 1. For example, 2, 3, 5, 7, and 11 are the first five primes. Do you know the sixth?

Quizzes: Your Ticket to Fun Learning. Dive In

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Prime numbers are unique because they don't show up in any times tables except their own. But remember, 1 isn't a prime because prime numbers have two factors, and 1 only has itself.

Take this quiz on prime numbers to test your understanding. Read each question carefully before choosing your answer. Check out the comments after each question – they might help clarify anything you're unsure about. Best of luck!

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The word 'prime' is an abbreviation for what?

[ ]	Primary
[ ]	Primative
[ ]	Priority
[ ]	It is not an abbreviation

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

Is the number 14 a prime number?

[ ]	Yes
[ ]	No
[ ]	Yes, because it is divisible by 2
[ ]	It depends which way you look at it

Which of these numbers is a prime number?

[ ]	4
[ ]	7
[ ]	9
[ ]	12

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

Which of these is not a prime number?

[ ]	13
[ ]	15
[ ]	17
[ ]	19

Which of these is a prime number?

[ ]	33
[ ]	35
[ ]	37
[ ]	39

What is the next prime number after 43?

[ ]	44
[ ]	45
[ ]	46
[ ]	47

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

[ ]	Yes
[ ]	No
[ ]	Sometimes
[ ]	Only if you are a genius

10.

What is the next prime number after 97?

[ ]	98
[ ]	99
[ ]	100
[ ]	101

Maths Quiz - Level 5-6 Algebra - Prime Numbers (Answers)

The word 'prime' is an abbreviation for what?

[ ]	Primary
[ ]	Primative
[ ]	Priority
[x]	It is not an abbreviation

Prime is a word in its own right

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
[x]	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

Is the number 14 a prime number?

[ ]	Yes
[x]	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

Which of these numbers is a prime number?

[ ]	4
[x]	7
[ ]	9
[ ]	12

All the incorrect answers have three or more factors

Is the number 1 a prime number?

[ ]	Yes, because it is a positive whole number
[x]	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

Which of these is not a prime number?

[ ]	13
[x]	15
[ ]	17
[ ]	19

15 can be divided by 3 and 5 as well as 1 and 15

Which of these is a prime number?

[ ]	33
[ ]	35
[x]	37
[ ]	39

35 appears in the 5 and the 7 times tables, 33 is in the 3 and 11 times tables and 39 (which may have tricked you) is divisible by 13 and 3

What is the next prime number after 43?

[ ]	44
[ ]	45
[ ]	46
[x]	47

You'd do well to memorise the first 30 or so prime numbers

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

[ ]	Yes
[x]	No
[ ]	Sometimes
[ ]	Only if you are a genius

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

10.

What is the next prime number after 97?

[ ]	98
[ ]	99
[ ]	100
[x]	101

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