Suma a 6 nr nat impare consecutive este 222
6 d va rog
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Răspuns:
15+17+19+21+23+25=120
Explicație pas cu pas:
a+b+c+d+e+f=120
Transformam
a+a+2+a+4+a+6+a+8+a+10=120
6a+30=120
6a=120-30=90
a=90:6=15
b=15+2=17
c=15+4=19
d=15+6=21
e=15+8=23
f=15+10=25