You were counting out exactly the right number of tickets to hit a price — that is MONEY MATH! The big discovery: the SAME amount can be built MANY ways (15 = 10+5, or 5+5+5, or fifteen 1s). Then in the fewest-tickets rounds you found the clever trick: always grab the BIGGEST ticket first, then the next biggest, then fill the rest. That greedy shortcut is exactly how cashiers and computers make change fast — and it works because money jumps in place-value steps: 1, 5, 10, 25. Tickets, coins and banknotes all follow the same idea. Every shop, bank and game arcade on Earth runs on this!