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What is the greatest common factor of 40, 43, and 21

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7 votes

Answer:

1

Explanation:

To find the greatest common factor (GCF) of 40, 43, and 21, you can first factor each number into its prime factors:

- The prime factorization of 40 is 2^3 x 5.

- The prime factorization of 43 is a prime number itself: 43 is prime.

- The prime factorization of 21 is 3 x 7.

Now, to find the GCF, you take the common prime factors with the lowest exponent:

GCF (40, 43, 21) = 2^0 x 3^0 x 5^0 x 7^0 = 1.

Therefore, the greatest common factor of 40, 43, and 21 is 1.

User Sarang Manjrekar
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