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

With the help clues provided in the image, can you find the 5 digit key?

What brings you down but never up?

In the attached figure, you can see a chessboard and two rooks placed on the chess board. What you have to find is the number of squares that do not contain the rooks. How many are there?

Arrange the numbers 1, 2, 3, 4, 5, 6, 7, 8 and 9 above and below the division line in a manner that the thus formed fractions equal to 1/3.

(You can use one number only once)

You are given four results as below:
1111 = F
2222 = E
3333 = T
Then, can you find out how to code 4444?

In The 1st month of this year(the year 2013), I noticed that the date 13-1-13 (13 January 2013) is special.

This date is special as:

Date * Month = Year.

Can you figure out which year of this century has a maximum number of such dates?

I look at you, you look at me I raise my right, you raise your left. What am I?

What is always in front of you but can’t be seen?

What is the difference between a jeweller and a jailer?