Problem

2004 AMC 12B Problem 25

Given that 2^{2004} is a 604-digit number whose first digit is 1, how many elements of the set S = \{2^0,2^1,2^2,\ldots ,2^{2003}\} have a first digit of 4?

\mathrm{(A)}\ 194 \qquad\mathrm{(B)}\ 195 \qquad\mathrm{(C)}\ 196 \qquad\mathrm{(D)}\ 197 \qquad\mathrm{(E)}\ 198


Full credit goes to MAA for authoring these problems. These problems were taken on the AOPS website.


Show/Hide Problem Tags

Problem Tags: Counting and probability Number theory

Want to contribute problems and receive full credit? Click here to add your problem!
Please report any issues to us in our Discord server
Go to previous contest problem (SHIFT + Left Arrow)