GCF easy
GCF medium
GCF difficult
Times Tables
D.A.R.E.
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
5 x 12
What is 60
100

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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
7 x 9
What is 63
200

True or False : The LCM of 24 and 72 is 72

True, both numbers share the smallest multiple of 72 

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
12 x 9
What is 108
300

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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
7 x 12
What is 84
400

True or False : The number 32 is a prime number.

False, 32 is a composite number, it has more factors that 1 and itself.

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
6 x 9
What is 54
500

What is the prime factorization of 90?

5 x 2 x 3 x 3