Direction: In each of the following questions, four words have been given, out of which three are alike in some manner and the fourth one is different. Choose out the odd one.

Direction: In each of the following questions, four words have been given, out of which three are alike in some manner and the fourth one is different. Choose out the odd one.

A man is 3 years older than his wife and four times as old as his son. If the son becomes 15 years old after 3 years, what is the present age of the wife? 

Ashok's mother was 3 times as old as Ashok 5 years ago. After 5 years she will be twice as old as Ashok. How old is Ashok today? 

Directions: In each of these questions, three words are related in some way. The relationship among the words in the question can best be represented by one of the five diagrams (a), (b), (c), (d) and (e) given below. Mark your answer accordingly.

Men, Rodents, Living beings

Directions: In each of these questions, three words are related in some way. The relationship among the words in the question can best be represented by one of the five diagrams (a), (b), (c), (d) and (e) given below. Mark your answer accordingly.

Professor, Birds, Mice

Select the correct combination of mathematical signs to replace * signs and to balance the given equation.
555 * 5 * 11 * 25 * 4  

Some equations are solved on the basis of a certain system. Find the correct answer for the unsolved equation on that basis.
2 x 2 = 64, 3 x 1 = 27, 6 x 2 = 1728, 3 x 3 = ?