■ Introduction
When it comes to problem collections, it tends to be a four-choice question, but sometimes I could guess how to solve it from the choices, and although I was able to solve it, I wasn't studying. Therefore, in this collection of questions, we stopped the selection question and tried to judge the correctness by writing the answer as if we actually wrote the answer on the notebook.
■ How to play
After looking at the question and deriving the answer, enter the formula. Buttons such as numbers and symbols are provided so that you can easily enter formulas. Push these buttons and combine them to create a mathematical formula and answer.
When you enter a formula and press the enter button, the correctness will be judged immediately. If you don't know, we also have an answer. Each item is divided into genres, and you can see the formulas for each.
■ About this app
We will add more and more content and number of questions on a regular basis.

■ Can be used at such times
・ Regular test measures
・ Center test measures
・ When you feel lack of calculation
・ When you want to do math IA