A, B, C, D, and E are five members of a family. A is the mother of B and C. D is the father of E and is married to A. If C is a teacher, what is the profession of E?

C. UNKNOWN

Identify the missing letter in the series: Z, X, V, T, ?

A. R

If '123' represents 'ABC', what does '456' represent in the same code?

A. DEF

Identify the number that does not belong to the group.

D. 20

Find the missing letter in the series: b, d, f, h, ?

A. J