You have an empty wine bottle with a cork that has been secured at the top in a normal way. There is a metal ring inside the bottle that is suspended by a string.

How can you make the metal ring drop to the bottom if you are not allowed to touch anything - not the bottle, not the cork, not the thread and not the ring?

If eleven plus two equals one, what does nine plus five equal?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

You are mixing a mixture of cement and Sand with five gallons of water. You have a garden hose giving you all the water you need. The problem is that you only have a four-gallon bucket and a seven-gallon bucket and neither has graduation marks. Find a method to measure five gallons.

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

Count The number of F's in the paragraph below:

"FINISHED FILES ARE THE RESULT OF YEARS OF SCIENTIFIC STUDY COMBINED WITH THE EXPERIENCE OF YEARS"

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

Can you find the company name in the pictogram below?

In a football game, Christina defeated Teresa by 2 - 0 but no man from either side scored. How can this be possible?