Which of the following numbers will replace the question mark (?) in the given series?
14, 23, 38, 59, ?, 119

Let's find the differences between consecutive terms in the series:
23−14=9

38−23=15

59−38=21

Now observe the differences: 9, 15, 21. They increase by a constant difference of 6:

15−9=6

21−15=6

Following this pattern, the next difference should be:

21+6=27

Adding this difference to 59 gives:

59+27=86

Let's double-check with the next term in the series:

Next difference =27+6=33

86+33=119

This perfectly matches the final term. Thus, the missing number is 86.