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

There are three boxes which are labeled as Rs100, Rs150, and Rs200. One box contains two notes of Rs. 50. The second box contains one note of Rs50 and one note of Rs100 The third box contains two Rs. 100 notes. All boxes are labeled incorrectly.

What is the minimum number of boxes you must check in order to label all boxes correctly?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

There is something which you can be arrested for attempting but not for successfully completing.

What 5-letter word typed in all capital letters can be read the same upside down?

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

What building has the most stories?

You have $100 with you and you have to buy 100 balls with it. 100 is the exact figure and you can't go below or above the numbers and you have to use the entire $100. If there is no kind of tax applied how many of each of the following balls will you be able to buy:

Green Balls costing $6
Yellow Balls costing $3
Black Balls costing $0.10

Now, how many of each must you buy to fulfil the condition given?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

People put me on the table and cut me but do not eat me. What am I?