GCF (HCF) of 77 and 56
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What is the Greatest Common Divisor of 77 and 56?
Answer
GCF (HCF) of 77 and 56 is
7
Common factors: 1, 7
7 divides both: 77 ÷ 7 = 11, 56 ÷ 7 = 8 — and 11 and 8 share no factor but 1, so no larger number divides both.
77 = 7 × 11
56 = 23 × 7
| Prime | 77 | 56 | Lowest power |
|---|---|---|---|
| 2 | — | 23 | — |
| 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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GCF Table
| Number 1 | Number 2 | GCF |
|---|---|---|
| 77 | 41 | 1 |
| 77 | 42 | 7 |
| 77 | 43 | 1 |
| 77 | 44 | 11 |
| 77 | 45 | 1 |
| 77 | 46 | 1 |
| 77 | 47 | 1 |
| 77 | 48 | 1 |
| 77 | 49 | 7 |
| 77 | 50 | 1 |
| 77 | 51 | 1 |
| 77 | 52 | 1 |
| 77 | 53 | 1 |
| 77 | 54 | 1 |
| 77 | 55 | 11 |
| 77 | 56 | 7 |
| 77 | 57 | 1 |
| 77 | 58 | 1 |
| 77 | 59 | 1 |
| 77 | 60 | 1 |
| 77 | 61 | 1 |
| 77 | 62 | 1 |
| 77 | 63 | 7 |
| 77 | 64 | 1 |
| 77 | 65 | 1 |
| 77 | 66 | 11 |
| 77 | 67 | 1 |
| 77 | 68 | 1 |
| 77 | 69 | 1 |
| 77 | 70 | 7 |