Thursday, 30 May 2013

So..the answer is .. ?


So..the answer is .. ?

91 comments:

  1. 12 - number of intersections made by internal lines

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  2. Answer is 14. 
    The real question is what's the mathematical equation?
    I think it is Sum of n^2 . Isn't it?

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  3. Yep I was gonna go with 14 also.

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  4. Sandeep Tulpule yes that's correct. so for this one, it's
    1^2 + 2^2 + 3^2

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  5. I ask the questions on this post since I'm the teacher :))

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  6. 21

    Edit: My bad, it is 14 and not 21 ^^

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  7. I agree with the 14, 9 1x1 squares, 4 2x2 squares and 1 3x3 square

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  8. 1 + 4 + 9 = 14

    General equation: 1 + 4 + ... + n^2 = n·(n+1)·(n + n + 1)/6

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  9. 13 - number of squares plus number of intersections.

    we would most certainly need a 3rd example to be-able to make any intelligent assumptions.

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  10. 11.25 : 5/4=1.25 -> 1.25*9=11.25

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  11. depends on the logic of how it is viewed:
    10 if you see 9 squares
      + The square containing them

    16 if you see 9 squares, 4 of which make up 1 square
      + 5 remaining squares
    + The square that contains all

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  12. For the "total number of squares" solution does anyone have a link for OEIS.

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  13. Considering this question is about the number of squares.. 14

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  14. I forgot: 20
    If you see 9 squares, 4 of which make up 1 square
    + 5 remaining squares
    + The square that contains all
    I forgot ... the 4 single squares that form a square inside the square that encloses all

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  15. Laura B When it comes 2x2 rows and columns, take the squares of 2 and 1 (4+1=5)
    when 3x3 take the squares of 3, 2 and 1 (9+4+1=14)

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  16. thank you, Corina Marinescu   I thought of a logical of points of view. :)
    ...And I was having fun :))

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  17. Laura B It's always fun to play with math.. I know :) Even my love still is physics ;)
    Cheers!

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  18. MANAS SRINIVAS Cannot be, counting all the squares will be 14.

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  19. 9*(1*1)
    4*(2*2)
    1*(3*3)
    _________
    14squares

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  20. * 14 (#squares)
    * 10 (regions in the plane)
    * 7 (sqr of (1+segments*2))
    * 7 (#lines - 1)
    * 5 (corners + 1)
    * 12 (#vertexs - 4)
    * ...

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  21. 20 (4 configs of the original model)

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  22. I'm saying 12 as it doesn't say anything about counting squares.

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  23. T K Briggs If u saw the answer at the first square and this ? sign at the second....what other info would u like me to tell u?

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  24. 12 if we are counting intersections....14 if we are counting squares

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  25. If we were counting intersections, the first box would be 9, not 5. Corners count too. ;-)

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  26. 11.5, if we are talking about area comparison............however, if you are talking about amount of squares, the answer would be 14.

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  27. Patrick Glenning I think we might be counting amount of squares. I could be wrong.

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  28. Insufficient data. Several answers are defensible.

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  29. 14 if squares, 7 if # of lines -1, or also 7 if its the number of wood lanes covered by the figure

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  30. Ummm...data is quite sufficient. U know the answer to the first square...

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  31. Or 10 if # of squares plus 1.

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  32. 5 regions in the first graph, 10 in the second?

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  33. 20 = 4 x original
    16.25 = 4 x original - 0.75xoriginal{to account for overlap} 
    14 = count of squares
    12 = no. of intersections made by internal lines 
    10 = no. of intrernal squares + 1 outer square
    7 = total no of intersections{incl. corners} - no. of internal squares

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  34. The answer is 14. It is how many squares in the diagram. For the first one, there is 4 small squares and one large square. For the second one, there are 9 small squares, 4 medium squares, and 1 large square, giving a total of 14.

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  35. Corina Marinescu One data point without explanation is not enough.

    I assume you know what 2 + 2, 2 * 2, and 2 ^ 2 equal. If I were to give you the following problem, what would the answer be?

    2 ♡ 2 = 4
    3 ♡ 3 = ?

    Only knowing that ♡ represents "some operator", we can't answer the question. It could be 6 (if ♡ is addition), 9 (if ♡ is multiplication), or 27 (if ♡ is exponentiation), or some other value (we have some clever people here, I'm sure they can come up something).

    Likewise, with your photo, there are several ways to get 5 from the first image:

    -- Number of squares of any size
    -- Number of squares of 1 or 2 units
    -- Number of intersections (not corners)
    -- Number of side intersections + 1
    -- Number of intersections with an even number of paths
    ... as well as others. These return different values for the second image, respectively:
    -- 14
    -- 13
    -- 12
    -- 9
    -- 8

    There is insufficient data to select.

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  36. Answer is 7
    Ref first answer being 5 ( I think it could be because 9 crosses or intersections minus the number of small boxes within the large one so that 4 )
    So 16 - 9 = 7

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  37. Damon Getsman Read my longer comment, third from the end. That should give you the gist.

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  38. Problem with math nerds...they always think at the complicated solution....data is sufficient. I gave u a simple square with a value, if I wanted to know the number of intersections, I'd have said more info to point in that direction ... I understand ur point Paul

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  39. Corina Marinescu wrote, "Problem with math nerds..."

    Just to clarify, you're aware that you posted this to the Mathematics community, and even had the hubris to call yourself "the teacher", yes?

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  40. I'm not going to debate about this with u Paul...in my opinion the post has enough data, u think different...end of the story. And just to clarify since is my floor, my drawing, my photo and my post...yep I'm "the teacher of this post".

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  41. Good teachers listen to student complaints.

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  42. Agreed with that Paul....that's why I'll stick to my hubris

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