Question

If the numbers $5,x,125$ are in G.P. what is the value of $x$?

• A. 25
• B. 50
• C. 15
• D. 55

Answer 1

The correct option is A

25

$5,x,125$ are in G.P.

$\therefore$ $\frac{x}{5}$ = $\frac{125}{x}$

$\Rightarrow$ $x^2$ = $5\times 125$

$\Rightarrow$ $x^2$ = $5^4$

$\Rightarrow x=5^2=25$