The Puzzle Challenge: Elevator Habits
Every day, when Grant gets home from work, he takes the elevator from the ground floor to the 16th floor. He then gets out and takes the stairs up the last four floors to his apartment on the 20th floor.
Clues: he only does this if he is alone in the elevator. Otherwise, he takes the elevator all the way to the 20th floor. When he leaves home, he takes the elevator straight from the 20th to the ground floor, regardless of whether he is alone in the elevator.
Can you solve the puzzle? Email me back with the answer at email@example.com and I'll post the winners, along with the answers on the blog.