GCF (HCF) of 3 and 9

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Greatest Common Factor of
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What is the Greatest Common Divisor of 3 and 9?

Answer

GCF (HCF) of 3 and 9 is
3

Common factors: 1, 3

3 divides 9 (9 ÷ 3 = 3), so the GCF is the smaller number itself.

3 — prime

9 = 32

Prime39Lowest power
33323

GCF = 3

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GCF Table

Number 1Number 2GCF
311
321
333
341
351
363
371
381
393
3101
3111
3123
3141
3153
3161
3171
3183
3213
3221
3243
3251
3273
3291
3303
3341
3363
3423
3453
3461
3471

FAQ

What is the Greatest Common Divisor of 3 and 9?

GCF (HCF) of 3 and 9 is 3

How to find the GCF of 3 and 9?

You can find the GCF of 3 and 9 by listing all factors of both numbers and picking the greatest common one, or by prime factorization. The GCF of 3 and 9 is 3.

What prime factors do 3 and 9 share?

The prime factorizations of 3 and 9 have 3 in common, and multiplying those shared primes gives 3 — exactly the greatest common factor.

How does the GCF reduce the fraction 3/9?

Divide the numerator and the denominator by the GCF 3: 3 ÷ 3 = 1 and 9 ÷ 3 = 3. So 3/9 in lowest terms is 1/3.

See Also