A Free Logic Puzzle & Brain Training Game
Equate 8 is an innovative free math puzzle game by the creator of The Devil's Calculator. This brain training logic puzzle challenges you to rearrange numbers in a 3x3 grid to solve eight equations simultaneously – 3 across, 3 down, and 2 diagonal. Complete each number puzzle in the fewest moves possible to earn medals and unlock new content!
A Math Game Inspired by Magic Squares & Sudoku
The idea originated from a playful experiment with magic squares. We wondered: could we arrange two-digit numbers in a 9x9 grid where all eight lines—three rows, three columns, and two diagonals—share a consistent arithmetic relationship? In exploring this puzzle, we stumbled upon something deeper. Equate 8 taps into the core of what makes games engaging: clear objectives, instant feedback, and a “no-lose” design that removes punishment from experimentation. The result is a math game that encourages persistence, curiosity, and joy.
Solving the logic grid in fewer moves will earn a silver or gold medal, but a bronze is awarded regardless, so don't stress. The daily math puzzle gives players a free way to play and unlock content. Acquire "streaks" tokens by playing regularly. Medals and streaks unlock cosmetic themes along with new themed and difficulty challenges in this brain training game!
An Educational Tool Disguised as a Casual Math App
A feature of the National Museum of Mathematics prestigious MOVES conference for families, Equate 8 is an interactive learning tool disguised as a casual app. It’s a dynamic learning experience designed to reshape how students engage with arithmetic and algebra. It blends meaningful mathematical exploration with game mechanics to foster fluency, conceptual understanding, and a lasting appreciation for problem-solving.
Educational & Non-Profit
Equate 8 is built both for educators and learners. An update allowing teachers to modify levels to align with their lesson plans is forthcoming. It aligns with key curriculum goals, adapts to various skill levels, and presents challenges in a low-pressure, high-reward environment. In an era where attention is hard-won and screen time is inevitable, we aim to make every moment spent with Equate 8 both fun and academically meaningful. With its blend of pedagogical depth, addictive design, and approachable format, Equate 8 exemplifies how games can drive meaningful educational outcomes. It empowers learners, supports teachers, and makes math feel like play. Read more about how the game was designed and inspired by magic squares below:
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