Cool Math Trick

Discussion in 'Miscellaneous' started by JParsonsX, Apr 10, 2015.

?

Is this cool?

Poll closed Apr 12, 2015.
Yes! 5 vote(s) 29.4%
Nah 4 vote(s) 23.5%
I knew about it 8 vote(s) 47.1%
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  1. Another neat math trick is the proof that 1=2.
    930o4, Apr 10, 2015
    #21
  2. Guys! I have an even -cooler- math trick! Assign the variable "y" any number. Do a summation of (x+y^2) for values of -z to z where z is any integer. Take the solution of that. Divide it by (2z+1). Take the square root of it. You end up with y.

    For people who don't know what a summation is, click here for an online summation calculator to play around with and test this. The number below the Greek letter Sigma is the lower bound (-z) and the number above is the upper bound (z). The area to the right of Sigma is for the equation.
    Celori, Apr 10, 2015
    #22
  3. I feel sorry for math because it wants its x but won't tell you y :]

    Yes, this is a silly post (it's 2AM :D)
    FDNY21, Apr 10, 2015
    #23
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  4. Well, the whole "math wanting its x" situation is a bit like voltage coefficients... It's a complex relationship.
    Celori, Apr 10, 2015
    #24
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  5. Meh, at least make it more credible please. 1 + 1 = 10. And I can back that up if you want me to ;)
    ShelLuser, Apr 10, 2015
    #25
    607 likes this.
  6. Well, uh, I can usually count to 9. Maybe 10 on a good day. Doesn't it go something like:

    1, 2, 3, goldfish, 6, 9?
    CadenMann, Apr 10, 2015
    #26
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  7. TechNinja_42, Apr 11, 2015
    #27
  8. Okay, I'll make one up :p

    1. Take a number in mind.
    2. Square it.
    3. Take the cosinus of that in degrees.
    4. Multiply it by 12.
    5. Round it to the closest integer.
    6. Square it, once again.
    7. Divide it by 11.
    8. Round it to the closest integer.
    9. Use the n you just got for n! (so, a factorial).
    10. Take the fifth root of that.
    11. Multiply it with 0.

    You'll get 0, unless you or the computer didn't do everything correctly! :)
    .
    .
    .
    Sorry.
    607, Apr 11, 2015
    #28
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  9. Euler's constant to the power of pi is 20. If it doesn't come out to that, your calculator has rounding errors.

    (Just kidding. It comes out to be just shy of 20. Don't hurt me, please.)
    Celori, Apr 11, 2015
    #29
  10. What does "to the power of" mean?
    607, Apr 11, 2015
    #30
  11. Or: "tot de macht" (Dutch).

    A slight detour: "to the power of pi" doesn't sound right on EMC. Don't you guys mean "by the power of pi pie?" :)
    ShelLuser, Apr 11, 2015
    #31
    607 likes this.
  12. Erm, isn't 4 to the power of 4- 4x4x4x4=256. To the power of is multiplying the number by itself as many times as the value of the power (someone else please rephrase that, I am aware I can't phrase it so that it actually makes sense xD)
    Petero555, Apr 11, 2015
    #32
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  13. Yes, this is right :D

    It's as simple as: 5 to the power of 5 is 5 multiplied by itself 5 times
    FDNY21, Apr 11, 2015
    #33
    Petero555 likes this.
  14. I have failed at mathing. (Haha, thanks for correcting me, I haven't mathed much lately)
    CadenMann, Apr 11, 2015
    #34
    607 and Petero555 like this.
  15. bump....
    JParsonsX, Apr 11, 2015
    #35
  16. I request that this thread be closed? :p
    JParsonsX, Apr 15, 2015
    #36
  17. To request thread closure, report the original thread asking for it to be closed. I'll do it for you now but you can remember that for next time. :)
    FDNY21, Apr 16, 2015
    #37
    607 likes this.
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