Question

What should we place in the (?) in the following number series : 1,8,21,42,73,116,?

Answer 1

LET US CHECK THIS ORDER 1,8,21,42,73,116
THE DIFFERENCE BETWEEN THEM IS 7,13,21,31,43,57
SO ADD 57 TO 116 WE GET 173

Answer 2

Answer:

take the difference of each term and then again take the difference of the difference

you will fin an icrease of 2