1 has only one factor.
The only common whole number factor of 4 and 5 is 1.
A prime number is a whole number greater than 1, whose only two whole-number factors are 1 and itself.
The only single things that can be pairs are pants, scissors and glasses. The number 60 can be broken down into factor pairs, but is not a factor pair by itself.
It is true.
The only number with a single factor is ' 1 '. Every other number has at least two factors: ' 1 ' and itself. A number with only those two factors and no others is called a "prime" number.
Only if enough copies of the single are sold.
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.
The only whole number that can go into 13 and 19 evenly (their common factor) is ' 1 '.
A single number cannot have a common factor because "common" refers to factors that two or more numbers have in common. You have only one number.
"Common" means "same for both". There's no such thing as a "common" factor of only one single number.