Notam cu "x" primul nr
x+x+2+x+4+x+6+x+8+x+10+x+12+x+14+x+16+x+18+x+20+x+22+x+24=48×13
13x+156=624
13x=624-156
13x=468
x=468:13
x=36
Raspuns : numerele sunt: 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60.