Calculando mmc e mdc

http://www.youtube.com/v/Lk_NqbL7pk0?version=3&autohide=1&autoplay=1&attribution_tag=jXmnoIRszwdXLo29cbYUkQ&showinfo=1&autohide=1&feature=share

Questões Clássicas de Raciocínio Lógico para Concursos Públicos Resolvid...

http://www.youtube.com/v/JsYU6KbHZ-w?version=3&autohide=1&autohide=1&feature=share&autoplay=1&attribution_tag=Ki7dNhYM1h6P8JxW7Hg9fQ&showinfo=1