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Maths Exam Puzzle

Maths Exam Puzzle - 12 January

Aaron is giving his exam and after spending a lot of time answering the questions, he asks the examiner about the time that is left for the exam.

The examiner is quite obtuse with her answer and says that the amount of time left is 1/5th of the time that has already passed.

Can you find out the amount of time left if the total time was 90 minutes?

For Solution : Click Here

6 comments:

  1. I think I came up with a puzzle that disproves duality mathematically:

    http://papoosedoorbelle.blogspot.com/2016/01/math-lateral.html

    ReplyDelete
  2. I think I came up with a puzzle that disproves duality mathematically:

    http://papoosedoorbelle.blogspot.com/2016/01/math-lateral.html

    ReplyDelete
  3. total time take is 90 minutes
    time left = 1/5(time passed)
    = 1/5(75)
    =15

    ReplyDelete
  4. Time that has passed = 1/5 * Total time = 1/5*90 = 18 minutes.
    Amount of time left = 90-18 = 72

    ReplyDelete