Math trainer: Professor Digit

***Nice and efficient brain trainer!*** Have you ever dreamed to be the professor of mathematics? And now you have a brilliant chance! You can make all the way with little Digit and help him to become a great Professor! This is very fun quest that will show you all the best aspects of mathematics! The rules of Math trainer: You have to pass all tasks for the given time. We'll forgive you only two wrong answers. Don't waste your time! You will have 4 different task types: pick the operation, pick the answer, compare and input the answer. First levels are simple but further you will need all your mathematical skills, ability to stay concentrated and ability to make decision fast! But do not be too serious - between the levels we will show you interesting facts and jokes about mathematics! So, are you ready to help Digit?)