Key to Get Question Mark's Wallet

Why to find Question Mark's Wallet?

Let's take a look at the given clues once again - 

1.Red: This key is somewhere to the left of the key to the door. 

2.Blue: This key is not at one of the ends. 

3.Green: This key is three spaces away from the key to the door (2 between). 

4.Yellow: This key is next to the key to the door.

5.Orange: This key is in the middle. 

Now, let's draw a table of locations and color of keys as below - 

From Clue No.5, it's clear that the orange key is in the middle.

As per Clue No.3, the green key is three spaces away from the key to the door (right key) (2 between). So, the possible positions of green and right keys
are -

Since as per Clue No.4, yellow key is next to the key to the door, the key to the door can't be positioned at 2 or 5. Hence, it might be positioned at 1 or 4 with Green key at 4 or 1.

But as per Clue No.1, red key is somewhere to the left of the key to the door. For that, the right key can't be positioned at 1 as in that case, no position would be left for the red key as per clue.

Hence, Green key must be at 1 and right key at 4.

 
And now as per Clue No. 4, yellow key is next to right key.

As per Clue No.1, red key is somewhere left to the right key,hence it must be at position 2.

And as per Clue No.2, blue isn't at either end. Rather blue key is the only key left. So, the position left for it is position 4 which is of Right key. Hence, Blue key itself is RIGHT key to the door of room where Question Mark's wallet is placed.