GCF (HCF) of 90 and 495

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What is the Greatest Common Divisor of 90 and 495?

Answer

GCF (HCF) of 90 and 495 is
45

Common factors: 1, 3, 5, 9, 15, 45

45 divides both: 90 ÷ 45 = 2, 495 ÷ 45 = 11 — and 2 and 11 share no factor but 1, so no larger number divides both.

90 = 2 × 32 × 5

495 = 32 × 5 × 11

Prime90495Lowest power
22——
3323232
5555
11—11—

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

GCF = 32 × 5 = 45

See Also

FAQ

What is the Greatest Common Divisor of 90 and 495?

GCF (HCF) of 90 and 495 is 45

How to find the GCF of 90 and 495?

You can find the GCF of 90 and 495 by listing all factors of both numbers and picking the greatest common one, or by prime factorization. The GCF of 90 and 495 is 45.

What prime factors do 90 and 495 share?

The prime factorizations of 90 and 495 have 3 × 3 × 5 in common, and multiplying those shared primes gives 45 — exactly the greatest common factor.

How does the GCF reduce the fraction 90/495?

Divide the numerator and the denominator by the GCF 45: 90 ÷ 45 = 2 and 495 ÷ 45 = 11. So 90/495 in lowest terms is 2/11.