1.  Choose the best alternative.
14 : 9 : : 26 : ?

A. 12
B. 13
C. 15
D. 31

Answer: Option C

Explanation:

The relationship is (2x - 4) : x.

As, (9 x 2) = 18 and (18 - 4) = 14
Similarly, If x =15 then,
(15 x 2 ) = 30 and (30 - 4) = 26
∴ ? = 15