Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not rounded numerals equals 24.

How can you leave a room with two legs and return with six legs?

A bomb goes off.
Carnage.
One person, only a few feet away, survives! How can this be?

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

I cannot talk, but I always reply when spoken to. What am I?

Can you place six X (crosses) in below board without making three in a row in any way ?

Spot the cat in the picture below

A man calls his dog from the opposite side of a river. The dog crosses the river without a bridge or a boat and manages to not get wet. How is this possible?

What goes through cities and fields, but never moves?

What is the largest number you can write with just 3 digits?