What is the greatest common factor of 21 42 and 56?

Answer 1

The GCF of 21, 42, and 56 is 7.

The factors of 21 are: 1, 3, 7, 21

The factors of 42 are: 1, 2, 3, 6, 7, 14, 21, 42

The factors of 56 are: 1, 2, 4, 7, 8, 14, 28, 56

The common factors are: 1, 7

The Greatest Common Factor (GCF) is: 7

Answer 2

To find the greatest common factor (GCF) of 21, 42, and 56, we first need to find the prime factors of each number. The prime factors of 21 are 3 and 7, of 42 are 2, 3, and 7, and of 56 are 2, 2, 2, 7. The GCF is the product of the common prime factors raised to the lowest power they appear in all numbers, which in this case is 2 * 7 = 14. Therefore, the greatest common factor of 21, 42, and 56 is 14.

Answer 3

Oh, dude, the greatest common factor of 21, 42, and 56 is 7. It's like the cool kid that all these numbers can hang out with and still be divided by. So yeah, 7 is the MVP in this math squad.