Question

Aflați numărul maxim de pagini ale unei cărți , știind ca cifra 3 s-a folosit la numerotarea paginilor sale de 71 de ori.

Answer 1

3,13,23,30,31,32,33,34,35,36,37,38,39,43,53,63,73,83,93,103,113,123,130,131,132,133,134,135,136,137,138,139,143,153,163,173,183,193,203,213,223,230,231,232,233,234,235,236,237,238,239,243,253,263,273,283,293,303,313,323,333,343,353,.............362

Sau1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,.......................................................362.