Logical Questions: Logical Puzzle

In a day at the library, 64 people borrowed books. Twice as many people borrowed a thriller only as borrowed a science fiction novel only. Three people borrowed a biography only and 11 people borrowed both science fiction and a thriller but not a biography. The same number borrowed a biography and a thriller but not a science fiction as borrowed one of each of the three types. Twenty-one people did not borrow a thriller. One more person borrowed a science fiction book and a biography book than borrowed a biography only.

  1. How many biographies were borrowed in total?
  2. How many people borrowed only two of three types?
  3. How many people borrowed a thriller, a biography and a science fiction?
  4. How many people borrowed a thriller only?
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Vineet Patawari

Hi, I'm Vineet Patawari. I fell in love with numbers after being scared of them for quite some time. Now, I'm here to make you feel comfortable with numbers and help you get rid of Math Phobia!

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