1) 190,191,192,193,194,...,199,200,201,202,203,204,205,206,207,208,210
9 numere................... 200 .....................8 numere
2) la fel ca la 1: 290....9nr......300 .....8nr....310
290,291,292,...,299,300,302,303,304,...309,310
3) la fel 890... 9nr in ordine crescatoate...900...8nr crescatoare... 910
890,891,892,...,899,900,901,903,904,909,910
