what's the probability of getting a king or a queen from a pack of 52 cards?

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

You need to climb ten stairs. At every stair, you can either take one step up or you can jump two steps up.

In how many different ways you can climb 10 stairs?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

On rolling two dices (six-sided normal dice) together, what is the probability that the first one comes up with a 2 and the second one comes up with a 5?

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

Can you find the 09 errors in the picture below?

As we know that white starts the game of chess. Can you find the scenario shown in the picture below is possible when all the white pieces are at the original place while the black pawn is not as in the below picture?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

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?