ひみつの計算箱｜算数・数学パズル

"The Secret Calculation Box" is a free math puzzle game where you deduce the calculation rules hidden between numbers.

For example, between "6 → 42," the hidden rule is "×7." Observe the changes in the numbers and guess the calculation inside the black box. In the advanced level, there are two boxes, such as "×2 → +3," naturally teaching you the order of operations and reverse calculation.

[Game Features]
・Beginner: Multiplication, 1 box
・Intermediate: Basic arithmetic operations, 1 box
・Advanced: Compound calculations, 2 boxes
・Master: Reverse calculation, squaring, equation structure
・Short challenge of 5 questions per play
・You can try the same problem again even if you get it wrong
・Consecutive correct answers increase combos and score multiplier
・Daily challenge of 1 question per day
・Hints and explanations of calculation rules after correct answers
・Background music that switches between home and game modes, correct/incorrect/clear sound effects

Recommended for those who enjoy mental arithmetic and math, as well as those who want to easily continue brain training and calculation practice. Develop your ability to interpret equations, expand expressions, and factorize them while playing.

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