Multiplication factors cannot be used to find divination factors.
I have never heard of subtraction being used to find the GCF. Factors refer to multiplication.
Since 3 x 7 = 21, then x is one factor and 21/x is the 2nd factor.
Use a calculator.
Divide the product by the factor[s] you know. The answer is the missing factor.
You make a line of numbers in this case factors.
Divide the product by the factor you have. 6 x ? = 42 42 ÷ 6 = 7
Find out about factors and factor trees.
A factor rainbow will show all of the factors. A factor pair is just 2 numbers that are factors of the number you want to find.
1 and 2 are.
There is always a common factor. If there are no common prime factors, the GCF is 1.
All factors of a number