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2 Egg Timers (Difficulty: Easy Peasy to Lemon Squeezy)

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  • 15-01-2006 1:47pm
    #1
    Teg Veece
    Registered Users Posts: 550 ✭✭✭


    With two sand-glass egg timers, one which times out 7 minutes and the other times 4 minutes, how would you time 9 minutes?


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    #2
    Blisterman
    Registered Users Posts: 7,456 ✭✭✭Blisterman


    Turn them both at the same time. When the 4 minute runs out, turn it over again immediatly.
    When the 7 minute runs out, turn it over. When the 4 minute runs out again, (8 minutes) turn the 7 minutes over, and when it finishes it will have been 9 minutes.


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    #3
    Teg Veece
    Registered Users Posts: 550 ✭✭✭Teg Veece


    Well done. What was that Die Hard Puzzle with the water tanks that was similar to this?


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    #4
    w66w66
    Closed Accounts Posts: 136 ✭✭w66w66


    the one from die hard was, measure four litres with a five litre bottle and three litre bottle.


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