Instructions

Select the number that can replace the question mark (?) in the following series.

Question 41

63, 82, 102, 123, 145, ?

Solution

Pattern is

Difference of 63 and 82 = 19

                    82 and 102 = 20

                    102 and 123 = 21

                    123 and 145  = 22 

                     145 and 168 = 23

therefore the answer is 168                                                                                                             


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