If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

You can find some missing letters in the picture. By placing two particular letters in the spaces, you can form a nine lettered word beginning from one of the corners and going clockwise direction to the middle. Can you find out the letters and the word?

There was an aeroplane crash, every single person died, but two people survived. How is this possible?

Look at the picture and find out which square is not linked with any of the other squares.

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?

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

What's a single-digit number with no value?

Find the next number in the series below

21 32 54 87 131 ?

A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?