найдите: а) нод(7,3);б)нод(17,13);в) нод (27,33).

(7,3)=3*7=21   (17,13)=17*13=221 (27;33)=27*11=297

7|7     3|3      17|17   13|13              27|3     33|3

1|        1|          1|        1|                    9|3       11|11

                                                           3|3        1|

                                                           1|