НОД (11,12) нок (42,70)

Простите, НОД(11,12)-найти не могу.НОК(42;70)=14 т.к.42  :   2=                                           70    :    7=21  :   3=                                            10    :   2=7   :   7 =                                              5   :    5=1                                                       1 7*2=1414*5=70             14*3=42