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?

Look at the picture and find out which square is not linked with any of the other squares.

The host of a game show, offers the guest a choice of three doors. Behind one is a expensive car, but behind the other two are goats.
After you have chosen one door, he reveals one of the other two doors behind which is a goat (he wouldn't reveal a car).

Now he gives you the chance to switch to the other unrevealed door or stay at your initial choice. You will then get what is behind that door.

You cannot hear the goats from behind the doors, or in any way know which door has the prize.

Should you stay, or switch, or doesn't it matter?

Can you name some countries which do not have the alphabet 'A' in them?

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?

Can you find the six hidden animals in the picture below?

What part of Turkey has the most feathers?

What is the Surname of Barbie Doll?

Can you count the number of quadrilaterals in the picture below?

What brings you down but never up?