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.

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

What does this below rebus puzzle mean?

Known by all without exception, Forever here, for your protection, Sometimes strong, sometimes weak, Right after the night I come - hot and chic. And while millions of miles away, I always get to you, I find my way. No life around could do without me, Can you guess what I might be?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

Can you solve the below tricky visual equation?

What word is represented by this rebus?

A Man gave one of his sons 10 cents and another son was given 15 cents. What time is it?
Hint: Figure out the relation between time and number, is not so easy..:)

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

What do you answer even though it never asks you questions?