Factors
Multiples
Common Multiples
Common Factors
Primes (hard)
100

The factors of 6

1,2,3,6

100

What are the multiples of 24?

24, 48, 72, 96, 120...

100

The least common multiple of 8 and 9 

72

100

The greatest common factor of 6 and 24

6

100

The first ten prime numbers

2, 3, 5, 7, 11, 13, 17, 19, 23, 29

200

The factors of 15

1, 3, 5, 15

200

The first five multiples of 13

13, 26, 39, 52, 65

200

The least common multiple of 6 and 7

42

200

The greatest common factor of 25 and 48

1

200

Ten prime numbers bigger than 10

11, 13, 17, 19, 23, 29, 31, 37, 41, 43

300

The factors of 36

1, 2, 3, 4, 6, 9, 12, 18, 36

300

The first 13 multiples of 7

7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91

300

The least common multiple of 8 and 24

24?

300

The greatest common factor of 9 and 27

9

300

Write 48 as a string of multiplications of prime numbers. For example, 12 is 3x2x2 and 21 is 7x3.

2x2x2x2x3

400

Factors of 48

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

400

True or False: When you multiply two prime numbers, the answer is prime.

False

400

33 is the LCM of these two prime numbers

3 and 11

400

The greatest common factor of 12 and 60

6

400

Write 72 as a string of multiplications of prime numbers. For example, 12 is 3x2x2 and 21 is 7x3.

3x3x2x2x2

500

The factors of 144

1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 36, 48, 72, 144

500

36, 45, 72, 108 are multiples of this number

9

500

The LCM of 11 and this number is 132

12

500

The greatest common factor of 132 and 22

11

500

Write 1320 as a string of multiplications of prime numbers. For example, 12 is 3x2x2 and 21 is 7x3.

11x5x3x2x2x2

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