Rachinskii, Sergei Aleksandrovich, 1836-1902
1001 задача для умственного счета [recurso electrónico] / Sergei Aleksandrovich Rachinskii - Project Gutenberg, 2005 - Project Gutenberg 16527 .
Public domain in the USA.
Text
Word problems (Mathematics) Mathematics -- Problems, exercises, etc.
QA
1001 задача для умственного счета [recurso electrónico] / Sergei Aleksandrovich Rachinskii - Project Gutenberg, 2005 - Project Gutenberg 16527 .
Public domain in the USA.
Text
Word problems (Mathematics) Mathematics -- Problems, exercises, etc.
QA