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cate cifre de 2 sunt folosite pt scrierea unei carti de 350 de pagini! ms!!

Răspuns :

99-9=90 cifre de 2
90:2=45pagini
45x2=90
de la 1 la 9=o cifra
de la 10 la    99=12,20,21,22,23,24,25,26,27,28,29,32,42,52,62,72,82,92=19 cifre
de la 100 la 200=102,112,120,121,122,123,124,125,126,127,128,129,132,142,152,162,172,182,192=20 de cifre

de la  200la300 =200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,232,242,252,262,272,282,292=38 de cifre
de la 300 la 350=302,312,320,321,322,323,324,325,326,327,328,329,332,342=15 cifre
1+19+20+38+15= 93 de cifre de 2       (sper ca am numarat bine).