Question

Find the missing term.

15	27	40	57
36	48	61	?

• A. $68$
• B. $78$
• C. $74$
• D. $69$

Answer 1

The correct option is B $78$

The difference between upper numbers is same as the difference between lower number.
like $27-15=48-36$
Similarly $57-40=x-61$
here $x=78$
Hence, option 'B' is correct.