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Summing numbers and then increasing used numbers

Puzzling Asked by Michael Primo on March 16, 2021

I was making a mathematical game (viewable here: www.michaelprimo.it/beta) where you have a 3×3 grid, one central yellow button with a generated number and the other eight blue buttons with clickable and summable numbers. I thought: "what if everything is predictable?" So I made this:

  • There are eight numbers: 1, 1, 1, 1, 1, 1, 1, 1, and a main number of value 2
  • You must sum the numbers you have to reach exactly that number
  • After that, all the numbers used for the sum AND the main number will be increased by 1
    • The next move will have 2, 2, 1, 1, 1, 1, 1, 1, and 3 as a main number. Now we must select numbers to make a sum of 3.
  • This is repeated until you finish the moves

What is the biggest main number you can reach? More importantly, is the game doable (as in no particular tricks and it’s not broken in some way)

I want to know if this puzzle I accidentally created during my game is good or not. I am not good with game theory, but I am interested in the argument.

One Answer

The biggest number you can reach is

This is because

As a bonus, highest reachable numbers a(k) on k=1,2,...,8 tiles are:

Correct answer by Vepir on March 16, 2021

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