Question

A number to the 8th power divided by the same number to the 4th power is 16. What is the number?

• A. 2
• B. 6
• C. 4
• D. 8

Answer 1

The correct option is A 2

Let the number is x
then according to the question
$\Rightarrow \frac{x^8}{x^4}=16$
$\Rightarrow x^{8-4}=16$
$\Rightarrow x^4=16$
$\Rightarrow x^4=2^4$
$\Rightarrow x=2$