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18 and 36 do.

So do 18 and 54, 36 and 54, 18 and 72, 54 and 72, and

an infinite number of other pairs of numbers.

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Wiki User

12y ago
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Wiki User

8y ago

18 and 1800

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Carew Carew

Lvl 2
4y ago

3 and 6

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Q: What 2 numbers have the HCF of 18?
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