###### Asked in Factoring and Multiples

Factoring and Multiples

# What is the greatest common factor of 40 and 55?

## Answer

###### Wiki User

###### April 26, 2009 10:14PM

A factor is a divisor - a number that will evenly divide into another number. The greatest common factor of two or more numbers is the largest factor that both numbers have in common.

One way to determine the common factors and greatest common factor is to find all the factors of the numbers and compare them.

The factors of 40 are 1, 2, 4, 5, 8, 10, 20, and 40.

The factors of 55 are 1, 5, 11, and 55.

The common factors are 1 and 5. Therefore, the greatest common factor is 5.

## Related Questions

###### Asked in Factoring and Multiples

### What is the greatest common factor for 40?

There is not a greatest common factor of 40 because there cannot
be a greatest common factor without two or more numbers to compare.
Common factors are factors that the numbers being compared have in
common.
The factors of 40 are 1, 2, 4, 5, 8, 10, 20, and 40.
The greatest common factor of 16 and 40 is 8.
The greatest common factor of 40 and 55 is 5.
The greatest common factor of 36, 40, and 96 is 4.

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