Cross Math
Fill the grid so every equation adds up
Cross Math is the number crossword — a grid of digits laced together by arithmetic. Fill the empty tiles with digits 1–9 so every row and every column equals its target. Each tile answers to two equations at once, so a single solution has to satisfy them all.
How to play
- Every row and column is an equation ending in a target after the =.
- Read each line strictly left to right — no "multiply first".
- Fill the blank tiles with digits 1–9; numbers may repeat.
- A target turns green when its equation checks out, red when it does not.
What it trains
Numerical reasoning and constraint-based deduction — the logic domain, where Apexwit players' in-game scores rise by up to +113%. Explore Logic training →
Improvement figures are observed in-app score gains, backed by peer-reviewed cognitive-training research.
Difficulty
Bigger grids (3×3 → 5×5), more operators (adding × and ÷) and fewer given tiles raise the challenge.
Related Logic games
Free to play · No signup required · Works on web, iOS & Android
Want to save your progress across devices? Create a free account →Frequently asked questions
Is Cross Math free to play?
Yes — Cross Math is completely free on Apexwit, with every difficulty level unlocked, no ads and no signup required. An optional subscription only adds cloud backup so your scores and streaks sync across devices.
Do I need an account to play Cross Math?
No. You can play Cross Math instantly on the web or in the iOS and Android apps — no signup needed. You only create an account if you want to back up and sync your progress across devices.
What does Cross Math train?
Numerical reasoning and constraint-based deduction — the logic domain, where Apexwit players' in-game scores rise by up to +113%.
What devices can I play Cross Math on?
Apexwit runs in any modern web browser and as an app on iOS and Android, so you can play Cross Math on a computer, phone or tablet — and pick up where you left off when you sync your progress.