A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.

5       10      15        20      25 ____?

A # B means ‘A is the sister of B’
 A @ B means ‘A is the daughter of B’
 A & B means ‘A is the husband of B’
 A % B means ‘A is the father of B’
 If A % B & C # D @ E, then how is B related to E?

Direction: Some equations have been solved on the basis of certain system. Find the correct answer for the unsolved equation on that basis.

If 1 + 4 = 9, 2 + 8 = 18, 3 + 6 = 15 then 7 + 8 =?

Which number will replace the question mark (?) in the following number series?
 5, 4, 6, 15, 56, ?

In a certain language, if '+' means 'subtraction', '×' means 'division', '÷' means 'addition', and '–' means 'multiplication', then find the value of the following expression (BODMAS rule does not apply in that language).
 8 ÷ 16 × 4 + 2 – 3

Select the option that is related to the fifth term in the same way as the second term is related to the first term and the fourth term is related to the third term.
 YAR : RAY :: TCA : ACT :: TAB : ?

Three of the following four letter-clusters are alike in a certain way and one is different. Pick the odd one out.

The second number in the given number-pairs is obtained by performing certain mathematical operation(s) on the first number. The same operation(s) are followed in all the number-pairs EXCEPT one. Find that odd number-pair.