If,

6 / 7 = 2
3 / 9 = 7
8 / 2 = 6

Then

4 / 5 = ?

Riddle me this, Riddle me that,
What am I? I am made of wood, but you can't see me down?

Can you place six matchsticks in a manner that each of the matchsticks is in touch with the other five matchsticks?

By adding four matchsticks, can you divide the square shown in the picture into two equal parts?

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?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

What does below rebus means ?

John and his team plan to rob a safe. They got just one chance to break the code else the local police will be informed. Below are clues:
A) Exactly one number is perfectly placed: 9 8 1
B) Everything is incorrect: 9 2 4
C) Two numbers are part of the code of the safe but are wrongly placed: 0 9 3
D) One number is part of the code of the safe but is wrongly placed: 1 4 7
E) One number is part of the code of the safe but is wrongly placed: 7 8 3

The more you take me, the more you leave me behind.
Who Am I?

What four weights can be used to balance from 1 to 30 pounds?