This section represents a collection of exercises with clues and examples which are meant to help you better understand basic concepts. As opposed, when solving exercises from your homework, you won’t be given any clues.
The exercises are generated with programming language which is why the same exercise won’t be met twice (at least not very often).
When solving them, you have two buttons – 'Check the exercise' - which tells you if you answered wrong or right and 'New exercise'.
By learning math, you learn to think.