Books about Mathematics -- Problems, exercises, etc. (sorted by popularity)

http://book.klll.cc/ebooks/subject/13989.opds 2025-08-15T16:37:15Z Books about Mathematics -- Problems, exercises, etc. (sorted by popularity) Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-08-15T16:37:15Z https://book.klll.cc/ebooks/16527.opds 1001 задача для умственного счета (Russian) Sergei Aleksandrovich Rachinskii