Question

Twice a number d? Isn't that d^2?

Answer 1

twice a no. d = 2d

Answer 2

Twice a number is 2d
A number squared = d^2

Answer 3

twice=2 times
if 2d=d^2
d=5
2(5)=(5)^2
10=25
which is not true so
twice a number is 2d not d^2