Four words have been given of which three are alike in some way and one is different. Choose the odd one out.

What will come next in the given series?
6L, 9M, 14O, 21R, ?

Damini is twice as old as Hari. Hari is 5 years older than Nipa. In 5 years, Damini will be three times as old as Nipa. How old is Hari now?

In each of the following questions a statement is given followed by two courses of Action. A course of Action is taken for improvement, follow up etc. Read the statement carefully and give answer -
Statement:
A survey conducted in eight airports has revealed that airports continue to be porous and security as bad as ever.
Course of action:
I. adequate perimeter fencing should be provided.
II. New machines of latest order should be deployed for security purposes.

Pointing to a Boy Sheela said ‘he is the only son of my grand mothers’s only child how is the Boy related to Sheela.

Read the following information carefully and answer the questions given below.
'3+2' means '3 is the father of 2'.
'3 – 2' means '3 is the sister of 2'.
'3 × 2' means '3 is the husband of 2'.
'3 ÷ 2' means '3 is the wife of 2'.

In a certain code language, "come at once mother very sick" is written as "XLNV ZG LMXV NLGSVI EVIB WJXP". What is the code for "sister"? 

Read the following information carefully and answer the questions given below.
'3+2' means '3 is the father of 2'.
'3 – 2' means '3 is the sister of 2'.
'3 × 2' means '3 is the husband of 2'.
'3 ÷ 2' means '3 is the wife of 2'.

If G ÷ Q + R – C – S – W + L is definitely true, which of the following is true? 

Read the following information carefully and answer the questions given below.
'3+2' means '3 is the father of 2'.
'3 – 2' means '3 is the sister of 2'.
'3 × 2' means '3 is the husband of 2'.
'3 ÷ 2' means '3 is the wife of 2'.

What should come in place of question mark (?) in the given expression to make, "X is the grand aunt of Z" definitely true?
X – W ÷ V + Y ? L + M – Z