Basic round structure

Each challenge brings a target number and a calculator where some keys, marked with ?, are unknowns: they may do what they show or something else. The player builds an expression in the format number operator number and submits it to see the real result.

The calculator answer is the only clue. Every attempt stays visible in the level history, and that is where the deduction happens: work out what each key really does, then hit the target.

General rules

• The challenge changes once a day, at midnight in your time zone.
• The challenges for each date are the same for every player.
• There is no losing: try as often as you need. Solving in fewer attempts earns more stars.
• Solving at least one level a day keeps your daily streak alive.

Available modes

Every mode uses the same calculator and the same difficulty measure, computed by a solver that guarantees each puzzle can be solved and deduced without ambiguity.

• Today’s challenge: three levels a day, easy, medium and hard.
• Levels: a 60-level campaign with up to three stars each.
• Endless: a single run on a budget of guesses; misses spend it, clean solves pay some back.

What this page does not include

This guide explains the structure of the game, but it does not provide solving strategies. Numixy is meant to preserve room for discovery inside each daily puzzle.