GCF (HCF) of 77 and 308
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What is the Greatest Common Divisor of 77 and 308?
Answer
GCF (HCF) of 77 and 308 is
77
Common factors: 1, 7, 11, 77
77 divides 308 (308 ÷ 77 = 4), so the GCF is the smaller number itself.
77 = 7 × 11
308 = 22 × 7 × 11
| Prime | 77 | 308 | Lowest power |
|---|---|---|---|
| 2 | — | 22 | — |
| 7 | 7 | 7 | 7 |
| 11 | 11 | 11 | 11 |
— = power 0: the prime is not a factor of this number, so it cannot be in the GCF.
GCF = 7 × 11 = 77
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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 | 293 | 1 |
| 77 | 294 | 7 |
| 77 | 295 | 1 |
| 77 | 296 | 1 |
| 77 | 297 | 11 |
| 77 | 298 | 1 |
| 77 | 299 | 1 |
| 77 | 300 | 1 |
| 77 | 301 | 7 |
| 77 | 302 | 1 |
| 77 | 303 | 1 |
| 77 | 304 | 1 |
| 77 | 305 | 1 |
| 77 | 306 | 1 |
| 77 | 307 | 1 |
| 77 | 308 | 77 |
| 77 | 309 | 1 |
| 77 | 310 | 1 |
| 77 | 311 | 1 |
| 77 | 312 | 1 |
| 77 | 313 | 1 |
| 77 | 314 | 1 |
| 77 | 315 | 7 |
| 77 | 316 | 1 |
| 77 | 317 | 1 |
| 77 | 318 | 1 |
| 77 | 319 | 11 |
| 77 | 320 | 1 |
| 77 | 321 | 1 |
| 77 | 322 | 7 |