Question

Suma a 4nr consecutive poate fi 564?

Answer 1

nu fiindca :
564:4=141(a)
141+142+143+144=530(nu)

Answer 2

a + b + c + d =564
b =a + 2
c = a + 4
d = a + 6
a + a + 2 + a + 4 + a + 6=564
4a=564 - (2 + 4 + 6 )
4a=564-12
4a=552
a=552 : 4
a= 138
b=138+2
b=140
c=138 + 4
c=142
d=138 + 6
d=144
a ) /...................../
b) /....................../+2/
c) /....................../+2/+2/
d) /...................../+2/+2/+2/
a=(564 -12) : 4=138
b=138 + 2=140
c=138+2+2=142
d=138 +2 +2 +2=144
Verificare: a +b + c + d =564
   138 + 140 + 142 + 144 =564