What should come in place of the question mark (?) in the given series?

4, 6, 10, 18, 34, ?

Given: 4, 6, 10, 18, 34, ?

Logic: The differences between consecutive terms are doubling each time:2, 4, 8, 16.​

Check the difference between consecutive terms:

6 - 4 = 2

10 - 6 = 4

18 - 10 = 8

34 - 18 = 16

The next difference should be 32 (double of 16).

Add this difference to the last number in the series:

34 + 32 = 66

So, the next number in the series is 66

Thus, the correct option is (d) 66.