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.

Can you fill the blank with the correct number?

6 30 870 756030 _____

Something Extraordinary happened on May 6th 19778 at 12:34am what was that?

After a heavy Thanksgiving meal, the night watchman went to work. In the morning, he told his boss he had dreamed that a saboteur planted a bomb in the factory and that he felt it was a warning. The boss promptly fired him. Worker confused, Why boss fire him?

Solve this riddle by finding the odd one out from the rest.

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10

I always drive my customer away.

Who am I?

What does this rebus means ?

My cousin lives in one story house in Antarctica. His house is made the of-of sandstone. what is the color of stairs?

How many bananas can you eat if your stomach is empty?