If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

What is next number in the pattern below:

131 517 192 123 ?

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

A guard is positioned at the one side of the bridge saying ‘A’. His task is to shoot all those who try to leave from ‘A’ to the other side and say ‘B’. He also need to welcome the person who comes from another side ‘B’ to his side ‘A’. The guard comes out of his post every 1 hour and looks down the bridge for any people trying to leave. You are at side ‘A’ and wish to go to another side ‘B’. you also know that it would take 1:45 hr to cross the bridge. How will you cross the bridge?

I am white when I am dirty, and black when I am clean. What am I?

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?

Why are televisions attracted to people?

There are six people in a family namely M, N, O, P, Q and R.

R and O are brother and sister.

N is the brother of Q's husband.
P is the father of M and grandfather of R.

How many male members are in the family?

Why do you find that most of the buildings are deprived of the 13th floor?

Can you count the number of triangles in the given figure?