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Best Answer

'5'

The HCF (High Common Factor) can be found by dividing each number by its prime factors.

Hence

15 = 3, 5.

25 = 5,5

'5' is common to both '15' & '25' , so it is the hcf.

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lenpollock

Lvl 16
2y ago
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Wiki User

10y ago

It is: 5

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Anonymous

Lvl 1
4y ago

5

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Q: What is the hcf for 15 and 25?
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