  # What number goes in the middle?

1,393 views posted May 16, 2014
Plz some one mentioned the right answer

+1 vote

Analysis as a multiple series
First is
5,14,23,32
Common difference=9
Second series -
2,10,18
Common difference=8
Third series -
20,27,34,41
C.d=7
4th series-
11,?,23
Common difference should be 6 . answer Nov 6, 2014
But i have a problem wen i was analysing this i found that the common difference in second last series 2,6,10 (c.d=4) is according to my analysis i,e continues decreasing by 1 but in the last series the common difference is decrease by 2 .
If anyone have better solution of this problem please tell me .

Similar Puzzles

What single-digit number replaces the "?" below to go in the middle of the following set of numbers?

1, 8, 10, ?, 8, 3, 11

+1 vote

3 rational numbers form a geometric progression in its current order.

1. If 8 is added to the middle number, then this new sequence forms an arithmetic progression.
2. If 64 is later added to the last number, then this yet another sequence forms a geometric progression again.
3. First number of these sequences is an integer.

Find the numbers?