Question

Elisa think about a number between 10 and 20 that has exactly 2 factor. What number did she is thinking?

Answer 1

I think 13

Answer 2

Do you know the definitions of factors? Factors are amount of different the numbers that can go into a number. Like let's take 27.
3*9=27
There is no more factors of 27. (a factor is not 1*27 or 1 times any number.)
A prime number (like 13) cannot have ANY factors because no even numbers go into it.

Please understand this and take this into consideration for your response