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Lateral Thinking Puzzles

Discussion in 'The Lounge' started by Arctiquaza, Aug 21, 2018.

  1. Arctiquaza

    Arctiquaza Never quite gone

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    Here you can post lateral thinking puzzles that you made, or found somewhere. You can also attempt to solve others puzzles. Credit the source if you did not make it!

    Here is mine that I made:


    Three friends were at a restaurant. Find out if each one ate either a hamburger, a salad, or nachos.

    -

    Hairy was not a vegetarian.

    Hagred loves cheese.

    Dumbdore ate a hamburger.

    Hagred was feeling full

    Hairy was a vegan

    Dumbdore did not eat the hamburger

    Hagred was good friends with Dumbdore

    Dumbdore was good friends with Harry
     
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  2. Laserdragon14

    Laserdragon14 Dragon Maverick

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    wait...Dumbdore both ate and didn't eat a hamburger...What sorcery is this?
     
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  3. Tepig

    Tepig The Talking Tepig

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    *Hairy Plotter theme plays*
     
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  4. Sethal

    Sethal Vibing to OST

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    A three-centimeter long elastic band is attached at one end. An ant crawls on it at a speed of 1 cm / min. After a minute, the tape is stretched by three inches. The ant crawls on with its speed, and after a minute, the band is stretched again by 3 cm and so on, until the ant has reached the end of the band. Suppose the tape can be stretched so far - how long does it take for the poor, totally confused ant to finally reach the end?

    Got it from: http://www.hirnwindungen.de/raetsel2/hirn_ameise.html.
    I found out the solution, can you?

    The ant is done in 11 minutes.
    Here's the 'full' solution, but it's poorly translated cuz why not.
    The ant first lays 1/3 of the distance, then 1/6, then 1/9, etc., so altogether after n minutes: the sum [from n = 1 to z] of 1 / (3n) - intended as a sum sign, where z represents the total time sought. So the sum [of n = 1 to z] of 1 / n = 3 has to be changed!
    For z = 10, the sum equals 2.928, for z = 11 the sum equals 3.0198, so the ant is ready in 11 minutes.
     
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