Math Operator Expert

This is a Brain Training game
a simple game
Using these basic operations: addition, subtraction, multiplication, and division to generate the desired results.
there are 2 game modes: "Make 10" and "Special target"
  - "Make 10": you will have a fixed target is 10
  - "special target" your goals will change continuously
with each question you have 30 seconds to think and answer period will be reduced when you reach high question
with 3 levels of difficulty for you to try yourself.