GCF for 12, 18 and 24

"Greatest Common Factor of 3 Numbers" Calculator

What's the Greatest Common Factor (GCF) of 12, 18 and 24?

Answer

GCF of 12, 18 and 24 is

Common factors: 1, 2, 3, 6

6 divides all three: 12 ÷ 6 = 2, 18 ÷ 6 = 3, 24 ÷ 6 = 4 — and 2, 3 and 4 have no factor but 1 common to all of them, so no larger number divides all three.

12 = 2² × 3

18 = 2 × 3²

24 = 2³ × 3

Prime	12	18	24	Lowest power
2	2²	2	2³	2
3	3	3²	3	3

GCF = 2 × 3 = 6

More with these numbers

Related Calculations

GCF Table

1st	2nd	3rd	GCF
9	12	18	3
10	12	18	2
11	12	18	1
12	12	18	6
12	13	18	1
12	14	18	2
12	15	18	3
12	16	18	2
12	17	18	1
12	18	18	6
12	18	19	1
12	18	20	2
12	18	21	3
12	18	22	2
12	18	23	1
12	18	24	6
12	18	25	1
12	18	26	2
12	18	27	3
12	18	28	2
12	18	29	1
12	18	30	6
12	18	31	1
12	18	32	2
12	18	33	3
12	18	34	2
12	18	35	1
12	18	36	6
12	18	37	1
12	18	38	2

FAQ

What's the Greatest Common Factor (GCF) of 12, 18 and 24?

GCF of 12, 18 and 24 is 6

What prime factors do 12, 18 and 24 share?

All three factorizations contain 2 × 3, and multiplying those shared primes gives 6 — exactly the greatest common factor.

Can you get the GCF of 12, 18 and 24 two numbers at a time?

Yes. The GCF of 12 and 18 is 6, and the GCF of 6 and 24 is 6 — the same answer, because the greatest common factor is associative and does not depend on the order of the three numbers.

How does the GCF simplify the ratio 12 : 18 : 24?

Divide every term by the GCF 6: 12 ÷ 6 = 2, 18 ÷ 6 = 3 and 24 ÷ 6 = 4. So 12 : 18 : 24 in lowest terms is 2 : 3 : 4, and no whole number other than 1 divides all three of those.

GCF for 12, 18 and 24

What's the Greatest Common Factor (GCF) of 12, 18 and 24?

More with these numbers

Related Calculations

See Also

GCF Table

FAQ

What's the Greatest Common Factor (GCF) of 12, 18 and 24?

What prime factors do 12, 18 and 24 share?

Can you get the GCF of 12, 18 and 24 two numbers at a time?

How does the GCF simplify the ratio 12 : 18 : 24?

See Also

1st	2nd	3rd	GCF
9	12	18	3
10	12	18	2
11	12	18	1
12	12	18	6
12	13	18	1
12	14	18	2
12	15	18	3
12	16	18	2
12	17	18	1
12	18	18	6
12	18	19	1
12	18	20	2
12	18	21	3
12	18	22	2
12	18	23	1
12	18	24	6
12	18	25	1
12	18	26	2
12	18	27	3
12	18	28	2
12	18	29	1
12	18	30	6
12	18	31	1
12	18	32	2
12	18	33	3
12	18	34	2
12	18	35	1
12	18	36	6
12	18	37	1
12	18	38	2

1st	2nd	3rd	GCF
9	12	18	3
10	12	18	2
11	12	18	1
12	12	18	6
12	13	18	1
12	14	18	2
12	15	18	3
12	16	18	2
12	17	18	1
12	18	18	6
12	18	19	1
12	18	20	2
12	18	21	3
12	18	22	2
12	18	23	1
12	18	24	6
12	18	25	1
12	18	26	2
12	18	27	3
12	18	28	2
12	18	29	1
12	18	30	6
12	18	31	1
12	18	32	2
12	18	33	3
12	18	34	2
12	18	35	1
12	18	36	6
12	18	37	1
12	18	38	2

1st	2nd	3rd	GCF
9	12	18	3
10	12	18	2
11	12	18	1
12	12	18	6
12	13	18	1
12	14	18	2
12	15	18	3
12	16	18	2
12	17	18	1
12	18	18	6
12	18	19	1
12	18	20	2
12	18	21	3
12	18	22	2
12	18	23	1
12	18	24	6
12	18	25	1
12	18	26	2
12	18	27	3
12	18	28	2
12	18	29	1
12	18	30	6
12	18	31	1
12	18	32	2
12	18	33	3
12	18	34	2
12	18	35	1
12	18	36	6
12	18	37	1
12	18	38	2