What number replaces the question mark? 3, 5, 8,13,22, ?

Question

Which number replaces the question mark - 12, 9, 7, 3, 4, 6, ??

Answer 1

3, 5, 8, 13, 22, ?

Difference between numbers :-
5 - 3 = 2
8 - 5 = 3
13 - 8 = 5
22 - 13 = 9

Procedure of calculating the difference is given below :-

2^0 + 1 = 2
2^1 + 1 = 3
2^2 + 1 = 5
2^3 + 1 = 9
2^4 + 1 = 17

Now, add 22+17 = 39

Ans :- 39

Answer 2

Working from top to bottom, multiple by 2 to each number and subtract 1, then 2, then 3 etc.

3 x 2 - 1 = 5

5 x 2 - 2 = 8

8 x 2 - 3 = 13

13 x 2 - 4 = 22

22 x 2 - 5 = 39

Comments

Thanks

Answer 3

2 because 1st and 2nd sum equals 3rd......