No, solving quiz is absolutely free of cost. MindStick is the platform where you can not only visit for services but also gain knowledge too, As you are completed with the test, MindStick Quiz will show you the scores which helps us know your errors and help you learn by watching your own mistakes. Quiz also don't charge anything. 

A quiz is a sort of game or mind sport in which participants attempt to answer questions accurately about a certain or category of subjects. Quizzes can be used as a brief evaluation in education and related fields to include growth in knowledge, abilities, or skills.

There are various categories from where you can choose your preferred quiz: 

To go directly on the Quiz section click on the following link: https://www.mindstick.com/quiz

READ MORE: Do we get to know our score after solving the Quiz at MindStick?