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Zoey The Avid Reader

Source: Probem #4 2016 AMC 10B

February 21, 2016
AMCAMC 10AMC 10 B2016 AMC 10B

Problem Statement

Zoey read 1515 books, one at a time. The first book took her 11 day to read, the second book took her 22 days to read, the third book took her 33 days to read, and so on, with each book taking her 11 more day to read than the previous book. Zoey finished the first book on a monday, and the second on a Wednesday. On what day the week did she finish her 1515th book?
<spanclass=′latex−bold′>(A)</span> Sunday<spanclass=′latex−bold′>(B)</span> Monday<spanclass=′latex−bold′>(C)</span> Wednesday<spanclass=′latex−bold′>(D)</span> Friday<spanclass=′latex−bold′>(E)</span> Saturday<span class='latex-bold'>(A)</span>\ \text{Sunday}\qquad<span class='latex-bold'>(B)</span>\ \text{Monday}\qquad<span class='latex-bold'>(C)</span>\ \text{Wednesday}\qquad<span class='latex-bold'>(D)</span>\ \text{Friday}\qquad<span class='latex-bold'>(E)</span>\ \text{Saturday}
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