Question

In each of the following question, select the related number from the given alternatives.
$10$ $:$ $99$ $:$ $:$ $?$

• A. $6$ $:$ $37$
• B. $7$ $:$ $45$
• C. $8$ $:$ $63$
• D. $9$ $:$ $85$

Answer 1

The correct option is C $8$ $:$ $63$

$99={10}^2-1=100-1$

Similarly,

$63=8^2-1=64-1$

Therefore, required pair is $8:63$

Hence, C is the correct option.