Răspuns :
16....=>10+6=16....=>1+6=7
25....=>20+5=25....=>2+5=7
34....=>30+4=34....=>3+4=7
43....=>40+3=43....=>4+3=7
52....=>50+2=52....=>5+2=7
61....=>60+1=61....=>6+1=7
25....=>20+5=25....=>2+5=7
34....=>30+4=34....=>3+4=7
43....=>40+3=43....=>4+3=7
52....=>50+2=52....=>5+2=7
61....=>60+1=61....=>6+1=7