Question

Select the correct alternative from the given ones that will complete the series.
$15,30,60,120,240,?$

• A. $480$
• B. $518$
• C. $445$
• D. $715$

Answer 1

The correct option is A $480$

$15\stackrel{\times 2}{\to }30\stackrel{\times 2}{\to }60\stackrel{\times 2}{\to }120\stackrel{\times 2}{\to }240\stackrel{\times 2}{\to }480$.