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.

A chicken farmer has figured out that a hen and a half can lay an egg and a half in a day and a half. How many hens does the farmer need to produce one dozen eggs in six days?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

If two's company, and three's a crowd, then whats four and five ?

There are three light switches outside a room. One of the switches is connected to a light bulb inside the room.
Each of the three switches can be either 'ON' or 'OFF'.

You are allowed to set each switch the way you want it and then enter the room(note: you can enter the room only once)

Your task is to then determine which switch controls the bulb?

Where do you go to learn how to make ice cream?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

There are forty elephants and they have forty-fore heads. How can this be possible?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

When does a USA Potato change its nationality?