I am an odd number. Take away a letter and I become even. What number am I?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

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

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

By what process could you make a 'Tea-Table' into food?

How can you drop a raw egg from a height onto a concrete floor without cracking it?

Can it be possible to build a house that has all its four walls facing towards the South?

A Doctor always sneezes before the rain. Doctor sneezes, Will it rain?

Usually, a boxing match consists of twelve rounds. In a particular friendly match between two heavyweights, the match was finished in the ninth round itself as one of the boxers knocked out the other one.

But, in that fight, no man threw even a single punch.

How can this be possible?

Pronounced as 1 letter, And written with 3, 2 letters there are, and 2 only in me. I’m double, I’m single, I’m black blue and grey, I’m read from both ends, and the same either way. What am I?