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.

You are given four tennis balls and asked to arrange those balls in a manner that the distance between each one of them is exactly equal. How will you do it?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

If you say my name, I will no longer exist. What am I?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

What does it mean?

Four children having five rocks each were playing a game in which they had to throw the rock at a particular solid area in the water. Child 1- Succeeded in throwing three rocks at a solid area but one of the rocks sunk. Child 3 - His aim was so bad that all rocks got sunk. Child 4- He was awesome and none of the rocks got sunk. Child 2 - Was the winner but was struck by a rock in the head and died. Who killed Child 2?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

What's the best place to go shopping in the ocean?

Which flower has two lips?