Ajutor va rog,dau coroana

Răspuns:
7,13,23,29,39,45,55,61,71,77,87
aduni nr cu 6 apoi cu 10
7+6=13
13+10=23
23+6=29
29+10=39
39+6=45
45+10=55
55+6=61
61+10=71
________
80,79,77,74,70,65,59,52,44,35
80-1=79
79-2=77
77-3=74
74-4=70
70-5=65
65-6=59
59-7=52
52-8=44
44-9=35
Răspuns:
Explicație pas cu pas:
7,13,23,29,39,45,55,61,71,... regula +6,+10,+6,+10,+6,...
80,79,77,74,70,65,59,52, ... regula -1.-2,-3,-4,-5,...