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Because every [whole] number can be divided by '1' without a remainder.

' 1 ' fits into every [whole] number a whole number of times.

Q: Why is 1 a common factor of every number?

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It's part of the identity property. Pick a number. Multiply it by one. The answer will be the number. That means that every number has the factor pair of itself and 1, so every number has one as a common factor.

1 is a factor of every whole number, and the gcf of two numbers can be 1 if there is no larger factor common to both numbers.

No, 1 is a factor of every whole number because 1 is a factor of every whole number.

As stated, that is false. Every number is not a factor of 1. 1 is a factor of every nonzero whole number.

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1 is a factor of every number.1 is a factor of every number.

The factor is 1.

The greatest factor of any number is the number itself. There is no integer that is the greatest factor of every number. One is a factor of every number. One is the GCF of co-prime numbers.

The least common factor of any set of numbers is 1.

1 is the factor that is common to all numbers.

Every number has 1 as its factor and 1 is the smallest factor of any number. So least common factor of two or more numbers is always 1. Therefore, least common factor of 23 and 25 is 1.

It's part of the identity property. Pick a number. Multiply it by one. The answer will be the number. That means that every number has the factor pair of itself and 1, so every number has one as a common factor.

1 is a factor of every whole number, and the gcf of two numbers can be 1 if there is no larger factor common to both numbers.

No, 1 is a factor of every whole number because 1 is a factor of every whole number.

The only common factor of 11 and 175 is 1. 11 is a prime number, the only two factors are 1 and 11. Every single number has a factor of 1. 11 does not divide into 175, so the only common factor is 1.