Mad Ade’s office is on the 3rd floor of the “Multinational Kebab and Lard Insurance Company” building. Though there is a lift yet, he likes using the big circular staircase. He goes up the stairs 2 at a time (to get more exercise) but is annoyed that there is always just 1 stair left over when he gets to his landing.
One day in a burst of energy, he went up the stairs 3 at a time, and still had 1 stair left over!
By counting (certainly not by doing it!) Mad Ade established that even if he could go up 4, 5 or 6 stairs at a time there would still be 1 left over.
Worse yet, no matter how many stairs Mad Ade did at a time (except for 1 or the lot) there would always be some left over.
How many stairs are there to Mad Ade’s office?
Answer
61 stairs