Humpty buys a box of 15 eggs, with 3 rows and 5 columns.
Each meal he removes one egg to cook and eat. If necessary, he moves one or more eggs in the box so that between meals there are always two lines of reflective symmetry.
What is the smallest total number of extra egg moves he can make while he empties the box?
Sign in or create an account to reveal answers, view the solution, and save your progress. Create a free account to unlock practice and keep track of your work.
Hamilton Mathematical Olympiad 2021 (2021)
One puzzle per day. Cryptarithm, Magic Square, Summit. No sign-up required to play.
Play daily puzzle →Interactive problems and curated lessons—water pouring, magic squares, knight's tour, and more.
Browse library →See how you rank. Top solvers by problems solved correctly. Sign in to climb the ranks.
View leaderboard →