It is a great app for mathematical training and IQ test.
Your can set questions count and answer time for each question. The questions are some simple math equation. The difficulty is to answer them quickly.
Try to get 100 points, have fun ^_^
9Apps 4.9
![국세청 홈택스 [손택스] on 9Apps](https://sg-res.9appsdownloading.com/sg/res/jpg/f7/df/69cc2f90120ec331db2630e0f5b6-6dh.jpg?x-oss-process=style/jmq200)
