What is the GCF of 15 and 66?
The GCF of 15 and 66 is 3.
Steps to find GCF
- Find the prime factorization of 15
15 = 3 × 5 - Find the prime factorization of 66
66 = 2 × 3 × 11 - To find the GCF, multiply all the prime factors common to both numbers:
Therefore, GCF = 3
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Related
Find HCF of: 30 & 132 45 & 198 5 & 22 75 & 330 105 & 462 30 & 66 15 & 132 45 & 66 15 & 198 75 & 66 15 & 330 105 & 66 15 & 462
GCF Calculator
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The greatest common factor (GCF) is also known as greatest common divisor (GCD) or highest common factor (HCF).