MATH - riddles and brain teasers

Logical thinking requires constant development. Try to solve math riddles and brain teasers. You do not need academic knowledge, most are solved with the help of resourcefulness and the ability to reason logically, some just train attentiveness.
The ability to think flexibly and analyze information is important in school, at work, and in everyday life. Math tasks is a great way to test your skills and even develop them!
Test your strength! In case if you have stuck, don’t worry, the hint will help you!