Question

Choose appropriate number for the fourth place.

$5:125::9:?$

• A. $792$
• B. $972$
• C. $279$
• D. $729$

Answer 1

The correct option is D $729$

Let the fourth number be $x$.

Given that:

$5:125::9:?$

Now,

$5:125=5:5^3$

Similarly, we can write

$9:x=9:9^3.$

$x=9^3$

$x=729.$

Hence, the appropriate number for the fourth place is $729.$