Direction: Select the related word from the given alternatives.

5 : 2431 :: 8 : ?

Find the missing number from the given alternatives.

Pointing towards a boy, a lady said, "he is only son of my father’s wife only daughter”. How is the lady related to boy?

In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?
m_ane_nma_men_eam_an 

In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?
o p _ o s _ t _ o _ p o _ i t e _ p p o _ i _ e 

If "+" means "-", "x" means “÷", "÷" means "+" and "-" means "x", then-
105 x 3 – 16 + 9 ÷ 11 = ?

In a certain code language, " ARRAY " is written as "19917". How is " LEARNING " written in that code language?

Pointing to a boy, Neha said,” He is the husband of the daughter of my only daughter’s mother’s husband.” How is the boy related to Neha?