Question

The product of three numbers is 312.

Two of the numbers are 3 and 13.
What is the third number and how did you get it?

Answer 1

3 * 13 * x = 312
39 * x = 312.....divide both sides by 39
x = 312 / 39
x = 8

lets check...
3 * 13 * 8 = 312
312 = 312 (correct)

ur answer is 8

Answer 2

The third number is 8 u multiply 3 and 13 which equals 39 divide 312 by 39 which equals 8