Scan the corners
Every board is filled with fresh random numbers. Look across each rectangle and compare its corners.
CornerWISEAvailable now on Google Play and the App Store
A new way to see numbers
CornerWISENumber Puzzle
Think corner to corner
8
4
6
2
− ÷
8 ÷ 2 = 48 − 2 = 6
3×3–7×7Board sizes
2Game modes
9Time limits
6Number ranges
35Languages
∞Fresh boards
3 × 3
Learn CornerWISE
Touch a number and drag to a valid diagonal corner. A line is valid if the sum, difference, product, or quotient of the two numbers appears in either of the other two corners.
How it works
CornerWISE
Think corner to corner.
Learn CornerWISE0 / 5
0 pointsFollow the highlighted line.
4 ÷ 4 = 1
In Normal mode, every move takes place inside a 2×2 square.
Official trailer
See CornerWISE in motion.
Follow the journey from the first connection to a new belt rank and high-speed Expert play.
Watch on YouTubeHow it works
Four operations. Countless connections.
The rules are quick to learn, but finding every relationship takes a truly sharp eye.
Find the equation
Connect a diagonal when addition, subtraction, multiplication or exact division reveals another corner.
Complete the board
Discover every valid line, protect your time and chase a perfect result on your local leaderboard.
Choose a game mode
Start close. Then see the whole board.
Tune the grid, number range and clock to create exactly the kind of round you want.
Normal
Master the neighborhood
Connect neighboring diagonal corners and build confidence one compact rectangle at a time.
Expert
Think across the grid
Search any rectangle on the board and uncover long-range connections hidden in plain sight.
Challenge friends
The same board for everyone
Share the exact same board with friends, then compare your results.
- 01Create and share
- 02Play the same board
- 03Compare results
A wiser path
Solve. Earn. Rise through the ranks.
Your full IQ reward reflects the mode, board size, number range and time limit, while your completion determines how much you earn. Each karate-inspired belt marks a new milestone.
In-game IQ Points
See the full reward before each round. Near-perfect clears matter most—not real-world intelligence.
Belt progression
Advance from white belt to black belt, 10th dan, and unlock larger Expert boards.
Expert headbands
Complete an unlocked Expert board at 100% to earn your first headband.
Streak weapons
Day Streak milestones unlock cosmetic martial-arts weapons for your karate figure. Complete any board at 100% on two consecutive days to earn your first weapon.
Protected transfer
Export and import progress when moving to a new phone—no account needed.
CornerWISE guides
Explore the puzzle from a different angle.
Try the arithmetic rule, learn how mental calculation shapes each round, or see how fair friend challenges work.
Free guided puzzleTry a free arithmetic puzzle
Try a free guided CornerWISE arithmetic puzzle, learn its four-operation rule, then continue with fresh number boards on Android or iPhone.
Read guide →Visual mental arithmeticA mental math puzzle game that feels like playPractice addition, subtraction, multiplication and division through a fast visual number puzzle for adults on Android and iPhone.
Read guide →Same board, fair comparisonChallenge friends to the same number puzzleShare one CornerWISE board by QR code, give every player the same settings and compare locally ranked results without creating an account.
Read guide →The first line is only the beginning