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Factors

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Question

Write the factor which is common to the numbers 20, 10, 7, and 5.

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Solution

Factors of 20 = 2 Ã— 2 Ã— 5 Ã— 1
Factors of 10 = 2 Ã— 5 Ã— 1
Factors of 7 = 7 Ã— 1
Factors of 5 = 5 Ã— 1
So the only common factor is 1.

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