a)4567 *,steluta se poate inlocui cu:0,1,2,3,14,5,6,7,8,9
se pot obtine nr:45670,45671,45672,45673,45674,45675,45676,45677,45678,45679
b)*se poate inlocui cu nr:1,2,3,4,5,6,7,8,9
se obtin nr:14567,24567,34567,4567,5467,64567,74567,84567,94567
c)nr pare * o inlocuim cu:10,12,14,16,18,20,24,26,28,30,32,34,36,38,40,42,......98 este ultimul
se formeaza nr:456710,456712,456714....