Question

Suma a cinci numere consecutive este 105.Determinati numerele:

Answer 1

a+a+1+a+2+a+3+a+4=105
5a+10=105
5a=95
a=19
a+1=20
a+2=21
a+3=22
a+4=23

Answer 2

Deci numere consecutive:n,n+1,n+2,n+3,n+4
Inlocuim in suma:
n+n+1+n+2+n+3+n+4=105
5n+10=105
5n=105-10
5n=95
n=95:5
n=19 primul numar
n+1=19+1=20 al doilea numar
n+2=19+2=21 al treilea numar
n+3=19+3=22 al patrulea numar
n+4=19+4=23 al cincelea numar
Proba:19+20+21+22+23=105