A man lives on the 13th floor in a block of flats, when using the lift he always presses the button for the 8th floor and uses the stairs for the rest of the way. Why?
Because cigars cannot be entirely smoked, a hobo who collects cigar butts can make a cigar to smoke out of every 5 butts that he finds. Today, he has collected 25 cigar butts. How many cigars will he be able to smoke?