Which of the following is correct to fill the series 2,4,12,48,240,.....?

A 720

B 1440

C 168

D 448

Solution

Correct Answer: Option B

২, ৪, ১২, ৪৮, ২৪০, ১৪৪০
২*১= ২;
২*২= ৪;
৪*৩=১২;
১২*৪= ৪৮;
৪৮*৫=২৪০; 
২৪০*৬= ১৪৪০

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