One day an extremely bored student began writing down the positive integers in order: 1,2,3,... When she got to 20 she noticed that she had used the digit 1 twelve times (once each for 1,10,12,13,...,19 and twice for 11). She asked herself if there was some number n (greater than 1) such that in writing down the integers from 1 to n she would have used the digit 1 exactly n times.
Is there such an n?
If so, is there a largest such n?
What if the digit 1 is replaced by another digit?
What if we work in a number base other than base 10?
(In reply to writer
Every case study should be written with the objective of learning in author’s mind. The objective could be developed to influence knowledge level, develop a particular skill, challenge the student or improve one’s ability https://essaysservice.com/business-case-study.html.