Math brain benders.

Discussion in 'PHYSICS & MATHEMATICS' started by Professor PinHead, Dec 8, 2012.

  1. Professor PinHead

    Professor PinHead Lost in the Tek.... Administrator Mushroom Doctor Cannabis Doctor Supporter

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    What addition combination adds up to one thousand when you use the number eight eight times?
     
  2. nomendubium

    nomendubium scraping by, since '97 Expert Identifier

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    :confused:
    36+8+8+8+8+8+8+8+8?
    :)
    oops 1,000 you said not 100....936+8+8+8+8+8+8+8+8?
     
  3. nomendubium

    nomendubium scraping by, since '97 Expert Identifier

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    888+88+8+8+8=1000?
     
  4. Jeff

    Jeff Well-Known Member Moderator Mushroom Doctor Supporter

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    Nice SG!
     
  5. Professor PinHead

    Professor PinHead Lost in the Tek.... Administrator Mushroom Doctor Cannabis Doctor Supporter

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    2 fathers and two sons sat down to have some shrooms for dinner. They ate exactly three shrooms, each person had a shroom. The question is for you to explain how....
     
    Last edited: Dec 8, 2012
  6. Jeff

    Jeff Well-Known Member Moderator Mushroom Doctor Supporter

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    There were three people. Grandfather, father and son.
     
  7. Professor PinHead

    Professor PinHead Lost in the Tek.... Administrator Mushroom Doctor Cannabis Doctor Supporter

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    :clap:
    Yup!

    You want to post a question?

    I have a few more if not....
     
  8. Jeff

    Jeff Well-Known Member Moderator Mushroom Doctor Supporter

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    Go ahead. I am just popping in every few minutes. Got to finish cleaning.
     
  9. Javadog

    Javadog Moderator Moderator Mushroom Doctor Cannabis Doctor

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    Very good SG and Jeff. LOL. Fun stuff.
     
  10. Jeff

    Jeff Well-Known Member Moderator Mushroom Doctor Supporter

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    This one isn't too hard.

    A man wanted to get into his work building, but he had forgotten his code. However, he did remember five clues. These are what those clues were:
    The fifth number plus the third number equals fourteen.
    The fourth number is one more than the second number.
    The first number is one less than twice the second number.
    The second number plus the third number equals ten.
    The sum of all five numbers is 30.

    What were the five numbers and in what order?
     
  11. Professor PinHead

    Professor PinHead Lost in the Tek.... Administrator Mushroom Doctor Cannabis Doctor Supporter

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    well to solve it I would start by messing with the sum 2nd number and 3rd number combination adding to ten.
     
    Last edited: Dec 8, 2012
  12. Jeff

    Jeff Well-Known Member Moderator Mushroom Doctor Supporter

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    This doesn't give away the answer btw.

    I broke it down like this.....
    Substituted 1,2,3 for a,b,c and put together some equations.
    B+1=D
    E+B=14
    A=(B*2)-1
    B+C=10
    That helped for me anyway.
     
  13. Professor PinHead

    Professor PinHead Lost in the Tek.... Administrator Mushroom Doctor Cannabis Doctor Supporter

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    I used a non algebraic way of solving it. I used combinations to narrow down the combination. I figured it was appropriate to solve it with a pun.

    well to solve it I would start by messing with the sum 2nd number and 3rd number combination adding to ten.

    9,*5,5*,6,5 doesn't work...... so I reanrage....

    9, 4*,6*, 6,5 deosn't work either when you solve for the others,



    1. The fifth number plus the third number equals fourteen.

    2. The fourth number is one more than the second number.

    3. The first number is one less than twice the second number.

    4. The second number plus the third number equals ten.

    ------
    1. = 8
    2. = 5
    3. = 7
    4. = For this one I plugged in 4,6
    ________
    The sum of all five numbers is 30.

    the order is 7,4,6,5,8
     
  14. Jeff

    Jeff Well-Known Member Moderator Mushroom Doctor Supporter

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    Yup. I messed up my second equation.
     
  15. Professor PinHead

    Professor PinHead Lost in the Tek.... Administrator Mushroom Doctor Cannabis Doctor Supporter

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    I did that once too plugging in the combos and realized when I went back to check that it was actually right once I fixed it. I almost incorrectly checked the correct set of numbers. That is always fun in an exam, :facepalm:
     
  16. Jeff

    Jeff Well-Known Member Moderator Mushroom Doctor Supporter

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    Interesting thing is you can come up with a correct answer with my screwed up equations.
     
  17. Professor PinHead

    Professor PinHead Lost in the Tek.... Administrator Mushroom Doctor Cannabis Doctor Supporter

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    Your equations are the best way to do it. I was just being a wise ass and using guesses of combinations to solve the combination.

    -----
    Here is one that sets you up for a trap.

    What digit is the most frequent between the numbers 1 and 1,000 (inclusive)? What number shows up least?
    To solve this you don't want to manually do all of the math but rather try to figure out a pattern.
     
  18. Jeff

    Jeff Well-Known Member Moderator Mushroom Doctor Supporter

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    I will just throw out a guess.....
    1 the most and 0 the least???
     
  19. Professor PinHead

    Professor PinHead Lost in the Tek.... Administrator Mushroom Doctor Cannabis Doctor Supporter

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  20. Professor PinHead

    Professor PinHead Lost in the Tek.... Administrator Mushroom Doctor Cannabis Doctor Supporter

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    In a certain country ½ of 5 = 3. If the same proportion holds, what is the value of 1/3 of 10 ?
    Answer