What is not a factor of six 2,3,4, or1

4 because 2, 3, and 1 can all fit into 6.

FactorsConcept

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