Solution:

10%

100 - [ (100-85)+(100-80)+(100-75) +(100-70)]
=100-(15+20+25+30)
=100-90

Solution:

Of course, it is impossible. Into the second room should have gone the 2nd guest, because the 13th guest was waiting in room number 1

Solution:

Shop till you drop

Solution:

Because the bed won't come to them.

Solution:

Since none of the men are wearing the color of suit that corresponds to their names, and Mr. Red was replying to the man in the blue suit, it had to be Mr. Green to whom he replied. We then know that Mr.Green is wearing a blue suit. Therefore, Mr. Red is wearing a green suit and Mr. Blue is wearing a red suit.

Solution:

Hard, using the first letter of the first word, the second letter of the second word, etc

Solution:

Jack and Jill are the names of two clown fishes. Unfortunately the bowl they were living in fell on the floor and broke into pieces. Thus both of them died.