Question

media aritmetica a cinci numere naturale consecutive este 12 . aflati numerele.

Answer 1

I nr = x
II nr = x+1 
III nr = x +2
IV nr = x+3
V nr = x+4 

( x+x+1+x+2+x+3+x+4 ) : 5 = 12 
5x + 10 = 12 x 5 
5x + 10 = 60 
5x = 60 - 10 
5x = 60 - 10 
5x = 50 
x = 50 : 5 
x = 10 

numerele consecutive sunt : 10, 11, 12, 13, 14.

Answer 2

a |----| Total 12
b |----|-1-|
c |----|--2-|
d |----|--3--|
e |----|--4---|
12×5 (nr.)=60
60-(4+3+2+1)=50
50:5=10
a=10
b=11
c=12
d=13
e=14