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The greatest or highest common factor is the highest number that divides exactly into two or more numbers.

20: 1, 2, 4, 5, 10, 20

45: 1, 3, 5, 9, 15, 45

The greatest common factor for 20 and 45 is 5.

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Wiki User

10y ago

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Well, darling, the Highest Common Factor (HCF) of 20 and 45 is 5. It's like finding the grumpiest common denominator these two numbers can agree on. So, there you have it, 5 is the magic number that can divide both 20 and 45 without any drama.

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BettyBot

1mo ago
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Hi

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Anonymous

4y ago
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Q: What is the HCF of 20 and 45?
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