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Simple addition

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  • 29-07-2011 9:46pm
    #1
    snow scorpion
    Registered Users Posts: 2,179 ✭✭✭


    Do this in your head only. Do NOT use paper and pencil or a calculator. Add the following numbers as quickly as you can. Take 1000 and add 40 to it. Now add another 1000. Now add 30. Add another 1000. Now add 20. Now add another 1000. Now add 10. What is the total?

    Now add the same numbers using a calculator.

    Do your answers match?

    I've done this five times and five times my answers have failed to match. (And I've been a member of MENSA since 1988! :eek: )
    Apparently 96% of people asked to perform this simple math answered 5,000, which is wrong. Very few answered 4,100—the correct answer


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    #2
    Dr. Bad Touch
    Closed Accounts Posts: 66 ✭✭Dr. Bad Touch


    lolwut? 4100? What answers are you getting?


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    #3
    FTGFOP
    Registered Users Posts: 2,389 ✭✭✭FTGFOP


    That's so weird.

    I think when your brain's dealing with the addition of the smaller numbers it rolls 90 over to 1000 instead of 100 when adding the last 10.


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    #4
    allydylan
    Registered Users Posts: 438 ✭✭allydylan


    i got 4,000


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    #5
    Scealta_saol
    Registered Users Posts: 191 ✭✭Scealta_saol


    It caught me out :( I got 5000


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    #6
    floutingmaxims
    Registered Users Posts: 764 ✭✭✭floutingmaxims


    Didnt expect that to happen but i actually did get 5000 when counting and 4100 by calculator... weird.


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