Răspuns :
A+a+1+a+2+a+3+a+4=260
Deci 5a =260-1-2-3-4
5a=250
Nr sunt 50
51
52
53
54
A+b+c+D+e= 260
B= a+1
C= a+2
D= a+3
E= a+4
a+a+1+a+2+a+3+a+4= 260
5a+ 10= 260
5a= 260-10= 250
A= 250:5= 50
B= 50+1=51
C=50+2= 52
D= 50+3=53
E= 50+4=54
B= a+1
C= a+2
D= a+3
E= a+4
a+a+1+a+2+a+3+a+4= 260
5a+ 10= 260
5a= 260-10= 250
A= 250:5= 50
B= 50+1=51
C=50+2= 52
D= 50+3=53
E= 50+4=54