1 /__/
2/__/..18./
3/__/__/__/..54.../
4/__/__/__/__/__/..72../
Suma e 474
Egalam segm:
474-(18+54+72)=474--144= 330(10 segm)
Cat e 1 segment sau primul numar?
330:10=33 (nr 1)
Nr 2=?
33+18=51(nr 2)
Nr3 =?
33×3+54=99+54=153(nr 3)
Nr 4=?
33+51+153= 237(nr4)
Verificare:33+51+153+
+237= 474