Răspuns :
(a+a+1+a+2+a+3):7=27 r 5
(4a+6):7=27+5
4a+6=27x7+5
4a=189+5-6
4a-188
a=188:4
a=47
nr. consecutive sunt:47,48,49,50
(47+48+49+50):7=27 r 5
194:7=27 r 5
27*7+5=189+5=194
(4a+6):7=27+5
4a+6=27x7+5
4a=189+5-6
4a-188
a=188:4
a=47
nr. consecutive sunt:47,48,49,50
(47+48+49+50):7=27 r 5
194:7=27 r 5
27*7+5=189+5=194