John can fit six large chocolate boxes or nine small chocolate boxes into a carton. How many cartons will he require to put sixty-six chocolate boxes into?

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?

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

If a shopkeeper can only place the weights on one side of the common balance. For example, if he has weights 1 and 3 then he can measure 1, 3 and 4 only. Now the question is how many minimum weights and names of the weights you will need to measure all weights from 1 to 1000? This is a fairly simple problem and very easy to prove also.

There is something which is always coming but never arrives?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

A man always keeps a spare tyre in his car. To make full use of all the five tyres, he changes the tyres in a manner that for a distance of 1, 00,000 km, each of them runs the same distance.

Can you calculate the distance travelled by each tyre on that journey?

I have nine bottles of wine and one of the nine bottles is poisoned.
I need to find the poisoned bottle with two facts
(1) Poison is deadly, only a sip will cost death
(2) I have two mice to do so.

How should I do it?

Which city is three-fifths chick two third cat and 50% goat?