Răspuns :
a+a+1+a+2+a+3=54
4a+6=54
4a=54-6
4a=48
a=48:4
a=12
nr sunt 12,13,14,15
12+13+14+15=54
4a+6=54
4a=54-6
4a=48
a=48:4
a=12
nr sunt 12,13,14,15
12+13+14+15=54
a+a+1+a+2+a+3=54
4a+6=54
4a=54-6
4a=48
a=48:4
a=12
cel mai mic=12