Why is Saturday stronger than Monday?

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

A man is found hanging dead from the ceiling of a room. The room’s dimensions are 15 x 15 x 15. The man is only 6ft tall and the rope was only 2ft long. There are no windows and only one door to the room. The door is bolted shut from the inside, and a puddle of water is under the man. How did he kill himself?

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

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

It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?

If 21x = 79x, what is the value of x?

After teaching his class all about Roman numerals (X = 10, IX=9 and so on) the teacher asked his class to draw a single continuous line and turn IX into 6. The teacher's only stipulation was that the pen could not be lifted from the paper until the line was complete.

Find out the missing number in the picture attached: