GCF (HCF) of 6 and 42
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What is the Greatest Common Divisor of 6 and 42?
Answer
GCF (HCF) of 6 and 42 is
6
Common factors: 1, 2, 3, 6
6 divides 42 (42 ÷ 6 = 7), so the GCF is the smaller number itself.
6 = 2 × 3
42 = 2 × 3 × 7
| Prime | 6 | 42 | Lowest power |
|---|---|---|---|
| 2 | 2 | 2 | 2 |
| 3 | 3 | 3 | 3 |
| 7 | — | 7 | — |
— = power 0: the prime is not a factor of this number, so it cannot be in the GCF.
GCF = 2 × 3 = 6
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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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