"Can you make 10 using + - × ÷ and ( ) from the numbers 8,1,1,5?"
Source: "Google Nexus 7 TV commercial" in Japan (2013)
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“Make Ten / Intuitive Math Puzzle" is the definitive version of the game known as Make Ten or Ten Puzzle in Japan. It is a famous story that the top Shogi (Japanese Chess) player Sota Fujii was obsessed with Make Ten puzzles. Like Sudoku, Make Ten Puzzle will help you keep your brain happy and healthy.

The rules of the game are very simple. The goal is to freely place four arithmetic operations (+, -, ×, ÷) and parentheses on a given four-digit number and make the result of the calculation a ten.

There are 25 levels of difficulty, and each level gets a little harder. Each time you start a new game, the questions change. You can play with intuitive controls by referring to the tutorial.

Let's make your spare time enjoyable with the simple but deep "Make Ten / Intuitive Math Puzzles".

~How to play~
When you start the game, four single-digit numbers corresponding to the difficulty level will appear. To these numbers, drag and place the four arithmetic operations (+, -, ×, ÷), parentheses and brackets in the center of the screen so that the result of the calculation is 10. If there is more than one answer, any answer that results in 10 will be the correct answer.

　Example 1: 1 2 3 4
　Answer: 1 + 2 + 3 + 4 (= 10)

　Example 2: 1 1 9 9
　Answer: { 1 + 1 ÷ 9 } × 9 (= 10)

To check the result, tap the “✔︎ “ mark at the bottom of the screen. If the answer is correct, you can proceed to the next level. If you cannot find the answer, tap the “?” mark at the bottom of the screen to know the answer.

~Screen Operations~
Title screen
　Load Game : Select a level to solve a puzzle you have solved in the past.
　Start New Game : Start a new game. The record of the previous games will be erased.
　Create Game : You can create a new game by specifying a 4-digit number.

Main screen
　4-digit number part : The number of the problem to make 10
　Operators and parentheses part : Drag to move or place. Operators and parentheses can be removed by sweeping after installation.
　“✔︎”, “?” part : Check result and answer.

~Charges~
No fee will be charged during the game.

~Contact~
[email protected]