The highest common factor is 33
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You should say "What is the common factor of 231 and 165?" or "What number is divisible by both 231 and 165?"In that case, the answer is 11.
The common factors of 60 and 231 are 1 and 3.
The Greatest Common Factor (GCF) is: 15
The Highest Common Factor (HCF) of 165 and 150 is 15. To find the HCF, you can list out the factors of each number and identify the highest common factor. The factors of 165 are 1, 3, 5, 15, 33, 55, and 165. The factors of 150 are 1, 2, 3, 5, 6, 10, 15, 25, 30, 50, 75, and 150. The highest common factor between the two numbers is 15.
231 is equal to 77 times 3. So the prime factors of 231 are 3, 7 and 11.