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

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?

What is the fastest way to double your money?

Solve the mathematical equation in the picture below.

A man walked into a pub and went straight towards the Barman. He asked for a dirty martini from the Barman. The Barman thought something and then pulled out a pistol from his drawer and aimed it directly at the man. Why did he do that?

Can you find out the missing number in the grid?

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

If two fifty-foot ropes are suspended from a forty-foot ceiling that is twenty feet apart, how much rope will you be able to steal if you have a knife?

The picture shows the dice results in each couple of throws. If they are actually following a pattern, can you find out the missing one?

Below, you can see some coding:
January = 1017
February = 628
March = 1335
April = 145
May = 1353
June = 1064
July = 1074
August = 186

Now deciphering the way it has been coded, can you find out how September will be coded?