Question

The product of my number and twice my number is 72

Answer 1

The answer is to your question is six.

Answer 2

 product of my number and twice my number is 72. What is my number?
The answers given are: A)6 B)12 C)24 D)72 
.
Let x = "my number"
then
x(2x) = 72
2x^2 = 72
x^2 = 36
x = 6