式霊の書 - 数式をなおす受験数学パズル

■ Moving the World with Mathematical Formulas

In the world of this book, formulas aren't about writing in answers.

They're about the mechanisms that operate the devices.

Place a gate at the point where a parabola intersects the ground and send light to a lighthouse.

Determine how to divide the sides of a triangle and verify if the three lines intersect at a single point.

Superimpose two waves and match their amplitude and phase.

You don't choose the correct answer from multiple-choice options. Move the knobs, enter values, and
press "Observe" to see where the light reaches and which conditions are violated.

Predict, observe, and rearrange. There's no limit to the number of attempts.

■ 51 Units, 153 Pages

51 units covering Math I, A, II, B, C, and III, with 3 pages each for introduction, application, and challenge.

20 types of devices: Zero point gate, rod of square root length, branch of probability to open and count,
gears, waves, tangents, integral channels, etc.

The challenge aspect involves resource budgets, and obstacles and order are also factors.

* Math I: Quadratic functions, square roots, sets, trigonometric ratios, data analysis
* Math A: Combinatorics and probability, conditional probability, properties of geometric figures, integers
* Math II: Expressions and proofs, geometry and equations, trigonometric functions, exponential and logarithmic functions, differential and integral calculus
* Math B: Sequences, recurrence relations, statistical inference
* Math C: Vectors, complex numbers, quadratic curves
* Math III: Limits, differential and integral calculus

* Each unit includes representative topics. This is not a problem set that covers all types of entrance exam questions.

■ If you don't understand, consult the example

* Reveal the "way of thinking" on the board
* The "example" shows the operation and numerical values ​​one move at a time. The lights don't illuminate while you're looking at them.
- Consulting the spirit on that side will give you a perspective, not the answer.
- You can always undo a move or return to the initial setup.

■ Another way to play: The Book of the Universe

11 layers, 60 problems, a collection of standard algebraic manipulation techniques. The cards only contain the names of techniques like "cross multiplication" and "completing the square."

You must calculate and fill in the numbers in (x + ?)(x + ?) yourself.

Correctness is not about checking the answer, but about verifying the calculation. You check if expanding the completed equation returns you to the original equation, so rearranging the order is also correct.

■ Standard Algebraic Techniques Become Characters

Cross multiplication is the weaver of the sash. Completing the square is the perfectionist who neatly arranges the vertices.

Differentiation and integration are siblings because that's what the fundamental theorem of calculus says.

All the character designs are based on mathematical facts.

- 16 characters in total, plus Shiori, the guide. Character portraits and three expressions
- You'll encounter that Shikigami the first time you clear a level.
- In the encyclopedia, you'll find explanations of standard strategies by the character themselves and episodes of their bond.
- The mist is something that hasn't been proven yet. Each time you return the Shikigami, a section of it clears.

■ Price

The first four units (12 levels) of the Observation Journey and the first to third layers (12 questions) of the Book of the Universe are free.

There are no limitations on functionality.

A one-time purchase of ¥500 unlocks all remaining 141 levels and 48 questions.

Those who have previously purchased can play all 153 levels.

- No additional charges
- No subscriptions
- No ads
- No gacha
- No stamina

■ For people who:

- Want to grasp what mathematical formulas represent through tactile experience.
- Have memorized formulas but don't know how to use them.
- Want to start learning math in their spare time before sitting down at their desk.
- Can continue playing if there are characters.