Four Solve
A fresh number puzzle every day. Four tiles, one target — can you reach it?
TARGET
24
6
Quick, calming, and ad-free. Build a streak and sharpen your mental math.
About the game
Four Solve is a fresh number puzzle every day. You get four tiles and one target — use all four numbers, once each, with +, −, × and ÷ to reach it. It's quick, calming, and ad-free. Build a streak and sharpen your mental math one solve at a time.
See it in action
A quick look at the daily puzzle, from your first tile to tomorrow's countdown.
How to play
One daily puzzle
The same starting challenge for everyone — one new number puzzle, every day.
Four tiles, one target
Use all four number tiles exactly once with +, −, × and ÷ to reach the target.
Solve in fewer tries
Tap a tile, pick an operator, and check your answer. Nail it in as few tries as you can.
Build a streak
Keep your streak alive by coming back to solve the daily puzzle day after day.
Live countdown
A live countdown shows you exactly when the next daily puzzle unlocks.
Daily reminder
Turn on an optional daily reminder so you never miss a day.
Quick Games
More ways to flex your mental math beyond the daily puzzle.
Speed Round
A 60-second math sprint — answer as many as you can before the clock runs out.
True / False
Right or wrong — decide fast whether each equation checks out.
Missing Operator
Fill in the blank +, −, × or ÷ to make every equation true.
Unlimited puzzles, for $0.99 a month
Love the daily challenge? Upgrade to Four Solve Pro to practice as much as you want and sharpen your number sense beyond the single daily puzzle.
Unlimited puzzles
Practice as much as you want, anytime — never wait for tomorrow's puzzle.
Beyond the daily
Sharpen your number sense well past the single daily challenge.
Support development
Help fund independent development and keep Four Solve growing.
$0.99
per month, cancel anytime
Coming soon to the App StoreWhy Four Solve
Calm & ad-free
No ads, no accounts — just a quick, calming daily brain workout.
Fair for everyone
Everyone gets the same daily puzzle. The same fresh challenge for all.
Sharpen mental math
Fast to play, easy to learn, and a great way to keep your mental math sharp.
No accounts. No tracking. No ads. Just a quick, calming number puzzle every day.
Need a hand?
Questions, bug reports, or feedback about Four Solve? Send us a note and we'll get back to you.