If CAT = 24, DOG = 26, then MOUSE = ?

Find the next term: 3, 7, 15, 31, 63, ?

If DELHI is coded as 73541 and CALCUTTA as 82589662, then CALICUT will be coded as:

In a family of 8 members, A and B are married couple. A is male. C is the son of D, who is the brother of E. E is the daughter of F, who is the mother of G. G is the sister of A. How is C related to B?

What comes next: A, C, F, J, O, ?

Which number should replace question mark: 12, 20, 32, 48, ?