GCF (HCF) of 5 and 55

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What is the Greatest Common Divisor of 5 and 55?

Answer

GCF (HCF) of 5 and 55 is
5

Common factors: 1, 5

5 divides 55 (55 ÷ 5 = 11), so the GCF is the smaller number itself.

5 — prime

55 = 5 × 11

Prime555Lowest power
5555
11—11—

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

GCF = 5

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GCF Table

Number 1Number 2GCF
5211
5221
5231
5241
5255
5271
5281
5305
5311
5331
5355
5361
5371
5405
5441
5455
5461
5471
5505
5555
5605
5655
5705
5755
5805
5905
51005
51205
51255
51505

FAQ

What is the Greatest Common Divisor of 5 and 55?

GCF (HCF) of 5 and 55 is 5

How to find the GCF of 5 and 55?

You can find the GCF of 5 and 55 by listing all factors of both numbers and picking the greatest common one, or by prime factorization. The GCF of 5 and 55 is 5.

What prime factors do 5 and 55 share?

The prime factorizations of 5 and 55 have 5 in common, and multiplying those shared primes gives 5 — exactly the greatest common factor.

How does the GCF reduce the fraction 5/55?

Divide the numerator and the denominator by the GCF 5: 5 ÷ 5 = 1 and 55 ÷ 5 = 11. So 5/55 in lowest terms is 1/11.

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