GCF (HCF) of 63 and 77
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What is the Greatest Common Divisor of 63 and 77?
Answer
GCF (HCF) of 63 and 77 is
7
Common factors: 1, 7
7 divides both: 63 ÷ 7 = 9, 77 ÷ 7 = 11 — and 9 and 11 share no factor but 1, so no larger number divides both.
63 = 32 × 7
77 = 7 × 11
| Prime | 63 | 77 | Lowest power |
|---|---|---|---|
| 3 | 32 | — | — |
| 7 | 7 | 7 | 7 |
| 11 | — | 11 | — |
— = power 0: the prime is not a factor of this number, so it cannot be in the GCF.
GCF = 7
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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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