Question

In the following question, a number series is given with missing of one term. Choose the correct alternative that will continue the same pattern and replace the question mark (?) in the given series.

$1,2,6,21,?$

• A. $88$
• B. $84$
• C. $440$
• D. $445$

Answer 1

The correct option is A $88$

You can find this logic

$(1\times 1)+1=2$
$(2\times 2)+2=6$
$(6\times 3)+3=21$

By same logic

$(21\times 4)+4=88$

Hence the correct answer is option A.