GCF (HCF) of 25 and 30
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What is the Greatest Common Divisor of 25 and 30?
Answer
GCF (HCF) of 25 and 30 is
5
Common factors: 1, 5
5 divides both: 25 ÷ 5 = 5, 30 ÷ 5 = 6 — and 5 and 6 share no factor but 1, so no larger number divides both.
25 = 52
30 = 2 × 3 × 5
| Prime | 25 | 30 | Lowest power |
|---|---|---|---|
| 2 | — | 2 | — |
| 3 | — | 3 | — |
| 5 | 52 | 5 | 5 |
— = power 0: the prime is not a factor of this number, so it cannot be in the GCF.
GCF = 5
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See Also
- Least Common Multiple - Find the Least Common Multiple (LCM) of two numbers
- Greatest Common Factor of 3 Numbers - Find the Greatest Common Factor (GCF) of three numbers
- Least Common Multiple of 3 Numbers - Find the Least Common Multiple (LCM) of three numbers
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