What is the GCF of 15 and 22?
The GCF of 15 and 22 is 1.
Steps to find GCF
- Find the prime factorization of 15
15 = 3 × 5 - Find the prime factorization of 22
22 = 2 × 11 - To find the GCF, multiply all the prime factors common to both numbers:
Note that there are no common prime factors. - Therefore, GCF = 1 (since 1 is a factor of every number)
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Related
Find HCF of: 30 & 44 45 & 66 75 & 110 105 & 154 30 & 22 15 & 44 45 & 22 15 & 66 75 & 22 15 & 110 105 & 22 15 & 154
GCF Calculator
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The greatest common factor (GCF) is also known as greatest common divisor (GCD) or highest common factor (HCF).