Million for the theorem!

Do you like detectives? Secrets? Duel and chase? This is all in the thriller "Million for the theorem!". Together with Becky and her friends, the reader will have to reveal secrets, avoid many traps and even solve sometimes unresolved problems.
What to do if you are born a girl, but love mathematics very much? If you have a talent from birth, but you will have to learn to dance at balls and music?
No, Bekka Griffin could not come to terms with such a fate. After all, they also announced a tournament, which is held every fifteen years among young men from 13 to 15 years old, to the title of best mathematics.
The girl decides to take part in it in any way. Will she be able to win among the boys-contestants who were preparing for the competition from birth? And prove the theorem over which the best minds of mankind are racking?
For secondary school age