Suppose we lay down two cups in front of you. One of the cups is filled with tea and the other one with coffee. Now we ask you to take a spoonful of tea and mix it with the coffee. At this moment, the coffee cup has a mixture of tea and coffee. You have to take that mixture (spoonful) and add it back to the tea.

Can you now tell if the cup of coffee has more tea or the cup of tea has more coffee?

How many triangles are there on the puzzle below?

If all the below statements are true

1. Gianni was either in Italy or France in 1997.
2. If Gianni did not kill Versace, Hilton must have killed him.
3. If Versace died of suffocation, then either Gianni killed him or Versace committed suicide.
4. If Gianni was in Italy in 1997, then Gianni did not kill Versace.
5. Versace died of suffocation, but he did not kill himself.

Who killed Versace and where was Gianni in 1997?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

There was an aeroplane crash, every single person died, but two people survived. How is this possible?

You need to pick one entry from pot A and one from pot B to have a perfect match. Can you do it?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

What goes up but never comes down?

Assume there are approximately 5,000,000,000 (5 billion) people on Earth. What would you estimate to be the result, if you multiply together the number of fingers on every person's left hand? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.) If you cannot estimate the number then try to guess how long the number would be.