Difference between revisions of "2017 AIME I Problems/Problem 3"
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Revision as of 17:37, 8 March 2017
We see that appears in cycles of , adding a total of each cycle. Since , we know that by , there have been cycles, or has been added. This can be discarded, as we're just looking for the last three digits. Adding up the first of the cycle of , we get that the answer is .