Question

Cuantas veces se usa el dijito 5 en los números enteros 1 al 1,000?

Answer 1

5,15,25,35,45,55,65,75,85,95,105,115,125,135,145,155,165,175,185,195,205,
215,225,235,245,255,265,275,285,295,305,315,325,335,345,355,365,375,385,395,405,415,425,435,445,455,465,475,485,495,505,515,525,535,545,555,565,575,585,595,605,615,625,635,645,655,665,675,685,695,705,715,725,735,745,755,765,775,785,795,805,815,825,835,845,855,865,875,885,895,905,915,925,935,945,965,975,985,995. cuenta los 5