Răspuns :
1.
a
a+1
a+2
===(+)
3a+3/3=105
3a+3=315
3a=312
a=104
nr sunt 104 105 106
2.
a
a+1
a+2
a+3
====(+)
4a+6
4a+6/4=108.5
4a+6=434
4a=428
a=107
nr sunt 107 108 109 110
a
a+1
a+2
===(+)
3a+3/3=105
3a+3=315
3a=312
a=104
nr sunt 104 105 106
2.
a
a+1
a+2
a+3
====(+)
4a+6
4a+6/4=108.5
4a+6=434
4a=428
a=107
nr sunt 107 108 109 110