Factors
Concept
Find factors of a number.
Utilization
Factors of a number are sets of numbers which can be multiplied together to create it. In this instance, we are provided with 6.
Factors of 6 >> (3 & 2), (6 & 1)
That's it - those are the only factors of 6 (1, 2, 3, and 6). There's no 4 to be seen - and thus, that is our answer!
Answer
4