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IMAS 2016/2017 Junior Division Round 2 Question 5

IMAS · IMAS 2016/2017 Junior Division Round 2

Question 5

On the bookshelf of Mar, there are Literature, Mathematics, History and Science books. If the number of Mathematics Books is 5 times that of the Literature books, and the number of Science books is 4 times that of the History books, which of the following is not a possible number for the total number of books on the bookshelf?
  1. 21
  2. 23
  3. 26
  4. 29
  5. 30