As Rachel travelled to school, she noticed that, at each bus stop, one passenger got off and passengers got on, where . After five stops, the number of passengers on the bus was times the number of passengers before the first stop. How many passengers were on the bus before the first stop?
UKMT Junior Mathematical Olympiad, 2023
Want a route through all this instead of an archive? The track
puts 2,604 problems in a working order, from Junior Challenge level to the IMO shortlist.