Not a giveaway

Discussion in 'Off-Topic' started by Rick, Sep 29, 2015.

  1. Rick

    Rick female nipple Gold VIP

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    This thread is not a giveaway, this is a earnaway.
    In this thread there are a variety of problems, the person that solves the most of the problems by Christmas (That's a lot of time) will be given a game(s) of value <£10 (~$15) (You can choose) (Might even throw in another game as a Christmas gift. (Remember what that's worth in the Christmas sale bro)

    I will regularly update this thread with additional problems

    If you post a correct answer to a problem (With proof) I will mark it as solved in the OP and reply to your post.

    Consider the following sequence:
    0, 1, 3, 4, 6, 9, 10, 13, 17, 18, 22, 27, 28
    Give the next 4 numbers in the sequence.
    This sequence is generated using similarities between number systems of other bases (Bases<5).

    For this equation, find d.
    [​IMG]

    Is this statement true?
    [​IMG]

    Solved by: Wrathofthelamb (See Post)

    Complete the following incidence matrix given that all rows are linearly dependent
    [​IMG]

    Answers from left to right: 1,1,0,0
    Solved by: Firedraft

    For the Matrix in Q4, represent it as an adjacency matrix
    Solved by: Wrathofthelamb (See Post)

    Draw all homeomorphically reducible trees of size n = 4
    Solved by: Holy

    Last summer, five brothers of the same family married five sisters at the same church, at only a few hours apart
    • The five brothers were: Tom, Lewis, Kian, Alex and Keith.
    • The five sisters were: Elizabeth, Chloe, Amelia, Patty and Nicole.
    • Kian was married after Nicole and Amelia, but before Tom and Alex
    • Elizabeth is not married to Kian.
    • The first and last couples to be married include Nicole, Patty, Lewis and Alex.
    Using these clues, list the couples and the time order in which they were married.

    Solved by: Wrathofthelamb

    Redox reactions occur in chemical cells to generate energy in the form of electrons. From the table below deduce the strongest reducing agent and state why in terms of electrode potential.

    [​IMG]

    Find the maximum value of x for the function:
    [​IMG]
    Solved by: Holy

    A violinist is playing a violin, when he plays the string AB he produces an overtone of 780Hz. The violinist presses on a point (C) to shorten the length of the string that vibrates when he is playing. The diagram below shows the lowest frequency of its periodic waveform. Region CB of the string is of length 240mm. From the diagram deduce the wavelength of the stationary wave produced for the overtone of the sting whilst being held.

    [​IMG]

    In terms of n, express the following sequence using one XOR function.
    1, 3, 2, 6, 7, 5, 4, 12, 13, 15, 14, 10, 11, 9, 8
    Where 1 is the 1st term (n=1) and 8 is the 15th term (n=15)

    Solved by: wrathofthelamb

    When a low molar concentration aqueous solution containing ethanedioate ions combines with to a solution of aqueous copper(II) ions, there is a substitution reaction. In this reaction four water molecules are replaced and this results in a new complex.

    Using your favorite tools (better be ms-paint m8), draw a diagram showing the bonds to the Copper ions, including bond angles, and correct planar representation.
     
    Last edited: Oct 5, 2015
    #1
  2. Ethan

    Ethan Emo

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    Answer 1
    29,31,32,34
    Proof
    1,2,1,2,3,1,3,4,1,4,1,1

    Damn I am only a Sophomore, and they never taught us this stuff yet. Rip
     
    Last edited: Sep 29, 2015
    #2
    • Disagree Disagree x 2
  3. Rick

    Rick female nipple Gold VIP

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    #3
  4. Firedraft

    Firedraft Devine Member Silver VIP

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    2 is 1 and 3 is no. Fuck yo proofs.
    I'm probably wrong anyways.
     
    #4
  5. Rick

    Rick female nipple Gold VIP

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    #5
  6. Ethan

    Ethan Emo

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    Image for question 3 won't show.
     
    #6
  7. Firedraft

    Firedraft Devine Member Silver VIP

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    Question 4 is 1100. Each line can only have two 1's and three 0's vertical and across.
    This proof also works. The 1's are moving downwards and across by one. When it reaches bottom it converts to the top.
     
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  8. Rick

    Rick female nipple Gold VIP

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    Ye, not really a proper proof, but ye
     
    #8
  9. ๑۩†Holy†۩๑

    ๑۩†Holy†۩๑ Member

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    The answer to problem #1 with proof: .... 33, 55, 78, 112


    problem1.png


    Answer to problem #4: 1100

    No two lines may have more than two 1's vertically or horizontally.

    Edit: aww I was beat to #4 D=
     
    Last edited: Sep 30, 2015
    #9
  10. Rick

    Rick female nipple Gold VIP

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    That's incorrect based off of the function that I used to generate the sequence. I do however realize that the sequence is too ambiguous. I've added another term to the question.
     
    #10
  11. wrathofthelamb

    wrathofthelamb Member

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    question 3, false
    proof : let x = 1
    x+2/x is in complex set
    therefor false
     
    #11
  12. Ethan

    Ethan Emo

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    Ouch.
     
    #12
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  13. wrathofthelamb

    wrathofthelamb Member

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  14. Rick

    Rick female nipple Gold VIP

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    That looks awful, but your adjacency list is correct

    Correct, nice counterexample m8
     
    #14
  15. wrathofthelamb

    wrathofthelamb Member

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    First : Nicole + Lewis
    Second : Keith + Amelia
    Third : Kian + Chloe
    Fourth : Tom + Elizabeth
    Fifth : Alex + Patty
     
    #15
    • Agree Agree x 1
  16. Alex

    Alex Mouth from the South

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    @Rick
    Says 5 brothers are apart of the same family and 5 females are apart of the same church ?
    But then later says they are sisters ? No.
     
    #16
  17. ๑۩†Holy†۩๑

    ๑۩†Holy†۩๑ Member

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    Problem 9: The Maximum is positive infinity while the minimum is 0.

    Proof: -x^2 = x^2

    The graph of x^2 is a parabola which has no limit on it's positive x value.

    f(Infinity) = -Infinity^2 = Infinity^2 = Infinity
     
    Last edited: Oct 1, 2015
    #17
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  18. Rick

    Rick female nipple Gold VIP

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    five brothers of the same family married five sisters at the same church

    5 brothers, all one family
    5 sisters (Obviously all part of one family if they're sisters)
    married at the church
     
    #18
  19. Expanix

    Expanix Community Member

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    I think I got the answer for problem 1

    33, 39, 40, 46
     
    #19
  20. Rick

    Rick female nipple Gold VIP

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    Nope, remember "This sequence is generated using similarities between number systems of other bases (Bases<5)."
     
    #20