# Algebra

Draw a number line and show all numbers that …
… are between 1 and 20 and have exactly 4 factors

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3. 👁 58
1. Just number 16.

16 = 2 ∙ 2 ∙ 2 ∙ 2

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posted by Bosnian
2. That was prime factorisation.

But if you use all numbers 1 ÷ 20 then:

6

1 , 2 , 3 , 6

8

1 , 2 , 4 , 8

10

1 , 2 , 5 , 10

14

1 , 2 , 7 , 4

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posted by Bosnian
3. you forgot 15

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posted by Vernice

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