GCF (HCF) of 10 and 70

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What is the Greatest Common Divisor of 10 and 70?

Answer

GCF (HCF) of 10 and 70 is
10

Common factors: 1, 2, 5, 10

10 divides 70 (70 ÷ 10 = 7), so the GCF is the smaller number itself.

10 = 2 × 5

70 = 2 × 5 × 7

Prime1070Lowest power
2222
5555
7—7—

— = power 0: the prime is not a factor of this number, so it cannot be in the GCF.

GCF = 2 × 5 = 10

See Also

FAQ

What is the Greatest Common Divisor of 10 and 70?

GCF (HCF) of 10 and 70 is 10

How to find the GCF of 10 and 70?

You can find the GCF of 10 and 70 by listing all factors of both numbers and picking the greatest common one, or by prime factorization. The GCF of 10 and 70 is 10.

What prime factors do 10 and 70 share?

The prime factorizations of 10 and 70 have 2 × 5 in common, and multiplying those shared primes gives 10 — exactly the greatest common factor.

How does the GCF reduce the fraction 10/70?

Divide the numerator and the denominator by the GCF 10: 10 ÷ 10 = 1 and 70 ÷ 10 = 7. So 10/70 in lowest terms is 1/7.