# Quick Answer: What is the greatest common factor of 15 and 42?

## What is the greatest common factor of 15?

3 x 5 = 15. The greatest common factor is 15.

## How do you find the greatest common factor of 15 and 40?

What is the GCF of 15 and 40? Find the prime factorization of 15. Find the prime factorization of 40. 40 = 2 × 2 × 2 × 5. To find the GCF, multiply all the prime factors common to both numbers: Therefore, GCF = 5.

## How do you find the GCF on a calculator?

List the prime factors that are common to each of the original numbers. Include the highest number of occurrences of each prime factor that is common to each original number. Multiply these together to get the GCF.

## What is the greatest common factor of 42?

Answer: Factors of 42 are 1, 2, 3, 6, 7, 14, 21, 42. There are 8 integers that are factors of 42. The greatest factor of 42 is 42. 3.

## What is the GCF of 10 15 and 20?

We found the factors 10, 15, 20. The biggest common factor number is the GCF number. So the greatest common factor 10, 15, 20 is 5.

## What is the GCF of 15 and 20?

Greatest Common Factor of 15 and 20 Greatest common factor (GCF ) of 15 and 20 is 5.

## What is the GCF of 7 and 10?

The GCF of 7 and 10 is 1.

## What is the GCF of 55 and 10?

The GCF of 10 and 55 is 5.

## What is the GCF of 16 and 36?

We found the factors and prime factorization of 16 and 36. The biggest common factor number is the GCF number. So the greatest common factor 16 and 36 is 4.

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## What is the GCF of 14 and 18?

What is the Greatest Common Factor of 14 and 18? Greatest common factor ( GCF) of 14 and 18 is 2.

## What is the GCF of 7/15 and 21?

The common factors for 7, 15, 21 7, 15, 21 are 1. The GCF (HCF) of the numerical factors 1 is 1.

## What is the GCF of 12 and 18?

In terms of numbers, the greatest common factor (gcf) is the largest natural number that exactly divides two or more given natural numbers. Example 1: 6 is the greatest common factor of 12 and 18.

## What are 42 factors?

Therefore, the factors of 42 in pairs are (1, 42 ), (2, 21), (3, 14) and (6, 7).

## What is the GCF of 90 and 50?

The Greatest Common Factor ( GCF ) for 50 and 90, notation CGF( 50, 90 ), is 10. Explanation: The factors of 50 are 1,2,5,10,25, 50; The factors of 90 are 1,2,3,5,6,9,10,15,18,30,45, 90.

## What is the GCF of 7 and 63?

The Greatest Common Factor ( GCF ) for 7 and 63, notation CGF( 7, 63 ), is 7. Explanation: The factors of 7 are 1, 7; The factors of 63 are 1,3, 7,9,21, 63.

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