GCF easy
GCF medium
GCF difficult
Factors, Primes and Composites
Times Tables
100
Greatest Common Factor of 6 18
What is 6
100
The Greatest Common Factor of 15 21
What is 3
100
The Greatest Common Factor of 18 36
What is 18
100
List the factors of 6

What are 1, 2, 3, 6

100
5 x 12
What is 60
200
The Greatest Common Factor of 2 24
What is 2
200
The Greatest Common Factor of 14 70
What is 7
200
The Greatest Common Factor of 32 48
What is 8
200

List the first 5 prime numbers

What are 2, 3, 5, 7, 11

200
7 x 9
What is 63
300
The Greatest Common Factor of 5 15
What is 5
300
The Greatest Common Factor of 20 44
What is 4
300
The Greatest Common Factor of 24 80
What is 8
300

What 3 factors are missing for 36?

1, 2, 4, 9, 18, 36?

What are 3, 6, 12

300
12 x 9
What is 108
400
The Greatest Common Factor of 12 20
What is 4
400
The Greatest Common Factor of 24 36
What is 12
400
The Greatest Common Factor of 18 90
What is 9
400

List the factors of 48

What are 1, 2, 3, 4, 6, 8, 12, 16, 24, 48

400
7 x 12
What is 84
500
The Greatest Common Factor of 3 9
What is 3
500
The Greatest Common Factor of 10 45
What is 5
500
The Greatest Common Factor 25 150
What is 25
500

The following numbers are composite

2, 9, 19, 26, 39, 47, 64, 95

What are 9, 26, 39, 64, 95

500

7 x 8 

What is 56

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