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Forums > Engineering Questions and Answers > Puzzles
Calendar Fun
Last Post 01 Mar 2012 06:16 PM by ffinybryn. 1 Replies.
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raj
Basic Member
Basic Member
Posts:167

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26 Feb 2012 10:42 PM
    Jason said: "Pick any three dates that are next to each other in a week on the calendar. Give me only the sum and I'll tell you your dates."

    Noriko secretly chose 14, 15, and 16, and gave the sum 45 to Jason. In a couple of seconds Jason said, "The dates are 14, 15, and 16."

    David secretly chose 22, 23, and 24, and gave the sum 69. Again, in a couple of seconds, Jason said, "The dates are 22, 23, and 24."

    Can you figure out Jason's trick ?
    ffinybryn
    Basic Member
    Basic Member
    Posts:101

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    01 Mar 2012 06:16 PM
    The middle date (MD) is Sum/3.

    Sum = (MD-1) + MD + (MD+1)
    Sum = MD + MD + MD + 1 - 1
    Sum = 3xMD
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