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.

What Does this text mean:

important=important

When it is alive we sing, when it is dead we clap our hands. What is it?

Replace the question mark with the correct number.

What is the word or phrase below?
R | E | A | D

As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.

How can one talk without saying a single word?

The Little ant seems to be always confused. Do you know why?

What kind of storm is always in a rush?

Find the next number in the series

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