GCF (HCF) of 90 and 465
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What is the Greatest Common Divisor of 90 and 465?
Answer
GCF (HCF) of 90 and 465 is
15
Common factors: 1, 3, 5, 15
15 divides both: 90 ÷ 15 = 6, 465 ÷ 15 = 31 — and 6 and 31 share no factor but 1, so no larger number divides both.
90 = 2 × 32 × 5
465 = 3 × 5 × 31
| Prime | 90 | 465 | Lowest power |
|---|---|---|---|
| 2 | 2 | — | — |
| 3 | 32 | 3 | 3 |
| 5 | 5 | 5 | 5 |
| 31 | — | 31 | — |
— = power 0: the prime is not a factor of this number, so it cannot be in the GCF.
GCF = 3 × 5 = 15
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- Least Common Multiple - Find the Least Common Multiple (LCM) of two numbers
- Greatest Common Factor of 3 Numbers - Find the Greatest Common Factor (GCF) of three numbers
- Least Common Multiple of 3 Numbers - Find the Least Common Multiple (LCM) of three numbers
GCF Table
FAQ
What is the Greatest Common Divisor of 90 and 465?
GCF (HCF) of 90 and 465 is 15
How to find the GCF of 90 and 465?
You can find the GCF of 90 and 465 by listing all factors of both numbers and picking the greatest common one, or by prime factorization. The GCF of 90 and 465 is 15.
What prime factors do 90 and 465 share?
The prime factorizations of 90 and 465 have 3 × 5 in common, and multiplying those shared primes gives 15 — exactly the greatest common factor.
How does the GCF reduce the fraction 90/465?
Divide the numerator and the denominator by the GCF 15: 90 ÷ 15 = 6 and 465 ÷ 15 = 31. So 90/465 in lowest terms is 6/31.
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