The book is the problem, offered on All-Union Correspondence Mathematical Olympiad (1965 - 1970.), And the All-Union competition correspondence mathematical school (1964-1979 .) For students in grades 7-10. Tasks are divided into thematic cycles, followed by their decisions, discussions and more questions for self-reflection.
LINK ORIGINAL FILE DJVU
http://mexalib.com/download/33851
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