Grade 6Mathpractice16 questions

Factors, multiples and primes

Grade 6: factors, multiples, prime numbers, highest common factor, lowest common multiple.

Free to play. Teams answer on one screen; your phone is the remote. No student devices.

Questions

Which of these numbers is a factor of 24?
- 5
- 7
- 8
- 9
Show answer
8
How many factors does the number 18 have?
- 4
- 5
- 6
- 8
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6
The number 1 is a factor of every whole number. (True or false?)
Show answer
True
Which of these numbers is a multiple of 7?
- 17
- 27
- 63
- 74
Show answer
63
What is the smallest multiple of 9 that is greater than 50? (Answer out loud)
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54
Every multiple of 4 is also a multiple of 8. (True or false?)
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False
Which of these numbers is prime?
- 21
- 27
- 29
- 39
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29
Which is the only even prime number?
- 2
- 4
- 6
- 8
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2
51 is a prime number. (True or false?)
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False
What is the highest common factor of 12 and 18?
- 3
- 36
- 6
- 9
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6
What is the highest common factor of 36 and 48? (Answer out loud)
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12
What is the highest common factor of 42 and 56?
- 14
- 21
- 28
- 7
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14
What is the lowest common multiple of 4 and 6?
- 10
- 12
- 2
- 24
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12
What is the lowest common multiple of 8 and 12?
- 24
- 4
- 48
- 96
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24
Two buses leave together at 9:00. One leaves every 6 min, one every 8 min. When next together? (Answer out loud)
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At 9:24 (24 minutes later)
What is the lowest common multiple of 6, 9 and 15?
- 135
- 30
- 45
- 90
Show answer
90