BosGuy brain teaser

Posted on September 27, 2013 | 24 Comments

RiddleEach Friday morning I post a riddle to get you to think outside the box and exercise your brain. If you are stumped, share it with a friend or colleague to see if you can figure it out together.

I’ll confirm answers later in the day so don’t worry if you don’t see your comment posted right away. I want to give everyone a chance.

This weeks riddle:
Solve this mathematical equation.

9 = 72
8 = 56
7 = 42
5 = 20
3 = ?

Like riddles? Check out past week’s brain teasers.

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24 responses to “BosGuy brain teaser”

  1. jerivalledor | February 6, 2014 at 9:10 am | Reply

    9*9-9=72, 8*8-8=56, 7*7-7=42, 6*6-6=30, 5*5-5=20, 4*4-4=12, 3*3-3=6

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  2. Cssey | September 28, 2013 at 1:20 pm | Reply

    after 6 it’s 2!

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  4. justajeepguy | September 27, 2013 at 2:47 pm | Reply

    Opps…the answer is 3=6, I put the multiplier.
    7×6= 42
    6×5= 30
    5×4= 20
    4×3= 12
    3×2=6
    2×1=2

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  5. truthspew | September 27, 2013 at 1:50 pm | Reply

    The algebraic stuff kicked in there. I saw the pattern but the solution ah well.

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  6. Gabriel Roy | September 27, 2013 at 1:50 pm | Reply

    9 = 72 (9×9)-9
    8 = 56 (8×8)-8
    7 = 42 (7×7)-7
    5 = 20 (5×5)-5
    3 = 6 (3×3)-3

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  8. BosGuy Blog | September 27, 2013 at 12:31 pm | Reply

    I really struggled with this riddle. However what I was told was that you multiply each number by one less (e.g. 9×8 = 72; 8×7 = 56) so 3×2 = 6.

    Much thanks Tony.

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  14. eric | September 27, 2013 at 10:20 am | Reply

    it’s 6. 4 would be 12.

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  19. Justin James | September 27, 2013 at 9:37 am | Reply

    3 = 6

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  20. Robert | September 27, 2013 at 9:34 am | Reply

    The answer is 6

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  22. suze294 | September 27, 2013 at 9:07 am | Reply

    6 – multiply n by n-1

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  23. John | September 27, 2013 at 8:59 am | Reply

    Would it be 6? The pattern seems to be the larger number divided by smaller equals next smaller number in sequence. The small number after 3 would be 2 so 6 divided by 3 would be 2.

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