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Factors & Multiples
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What are the factors of 21?
1, 3, 7, 21
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What is the divisibility rule for 5?
The number must end in 5 or 0.
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How do I know when a number is a factor of another?
You can divide the number by it with no remainder
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Is the number 1 prime or composite?
neither
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What are the factors of 5?
1 and 5
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_______ x _______ = product
factor
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What are the first five multiples of 7?
7, 14, 21, 28, 35
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Any even number has which factor?
2
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What are the factors of 18?
1, 2, 3, 6, 9, 18
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What are the factors of 2?
1 and 2
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What are the factors of 12?
1, 2, 3, 4, 6, 12
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What are the factors of 81?
1, 3, 9, 27, 81
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What are the factors of 7?
1 and 7
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A prime number has how many factors?
2
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What are the factors of 1?
1
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What is the divisibility rule for 3?
Add the digits. If the sum is a number divisible by 3, 3 is a factor.
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What are the factors of 36?
1, 2, 3, 4, 6, 9, 12, 18, and 36
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If 2 and 3 are factors of a number, so is...
6
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What are the factors 16?
1, 2, 4, 8, 16
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What are the first five multiples of 6?
6, 12, 18, 24, 30
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A composite number has how many factors?
more than 2
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What are the factors of 20?
1, 2, 4, 5, 10, 20
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What are the factors of 54?
1, 2, 3, 6, 9, 18, 27, 54
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What are the factors of 25?
1, 5, 25
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Okay!
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