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Verified Answer :

12 times 6 is 72.

We find this by adding 12+12+12+12+12+12
                                       24+24+24
                                         48+24
                                           72
This is another way to get to our answer. 


126 is 72.

6= 6
1
12= 62
18= 6
3
24= 64
30= 6
5
36= 66
42= 6
7
48= 68
54= 6
9
60= 610
66 = 6
11
72= 612

bonus

6
13= 78