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suma a 5numere consecutive este55 afla valoarea fiecărui numar

Răspuns :

I___I
I___I+1
I___I+1+1
I___I+1+1+1
I___I+1+1+1+1
55-10=45
45:5=9
nr sunt 9,10,11,12,13

a+b+c+d+e=55
b=a+1
c=a+2
d=a+3
e=a+4
-------------------------
|-----|(a)
|-----|+1(b)
|-----|+2(c)
|-----|+3(d)
|-----|+4(e)
55-1-2-3-4=45(reprezinta 5P)
45:5=9(a)
9+1=10(b)
9+2=11(c)
9+3=12(d)
9+4=13(e)