At the endpoints of a diameter of a circle are written and . At each step, every arc between adjacent marked points is bisected, and at the midpoint we write the sum of the numbers at the endpoints of that arc. This is repeated for steps. Find the sum of all numbers written after steps (including the original two 's).
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.
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 →