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Below are the answers to our 2013 Maths Masters' Summer Quiz. The detailed solutions can be downloaded here: Easy, Medium and Hard. If you're looking for more puzzles, you can check out our previous quizzes: the 2012 Quiz; the 2011 Quiz; the 2010 Quiz; the 2009 Quiz; the 2008 Quiz. Easy 1: 45 and 40. Easy 2: The circumference. Easy 3: The only pair is 2 and 997. Easy 4: 7 pages. Easy 5: 1. Easy 6: 1/16 and 1/4. Easy 7: 5. Easy 8: 13. Easy 9: 372 votes. Easy 10: The number in the top left corner is 16. Medium 1: 73. Medium 2: 1/3. Medium 3: 13 marbles. Medium 4: Niels. Medium 5: More than half. Medium 6: A loss of 69 cents. Medium 7: 2 helpers. Medium 8: 2/3. Medium 9: 17 and 45. Medium 10: Take 1, 2 and 3 bars from the piles. Hard 1: (3, 8, 35), (4, 7, 30) and (5, 6, 28). Hard 2: 25/74. Hard 3: The areas are equal. Hard 4: 3 moves. Hard 5: 14.5 meters. Hard 6: The other possibilities are the sequences starting with 14 and 25. Hard 7: 120 ounces. Hard 8: 5050. Hard 9: The left side. Hard 10: If you have 11 different nets then you’re done! |
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