Power of 9's - never subtract again

Discussion in 'Technology and Internet' started by Abdicate, Apr 9, 2017.

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Do you like mathematics?

  1. Yes

    2 vote(s)
    66.7%
  2. No

    1 vote(s)
    33.3%
  3. Sometimes

    0 vote(s)
    0.0%
  1. Power of 9’s

    Goal: Get to the number 9 with the numbers you're given.

    Definition:
    9’s compliment is 0 because it’s already 9.
    8’s compliment is 1 because 8+1=9.
    7’s compliment is 2 because 7+2=9.
    6's compliment is 3 because 6+3=9.
    5's compliment is 4 because 5+4=9.
    etc.

    Supposed you want to do this subtraction by only adding:

    872 - 218 = ???

    Take the higher number and get its 9’s compliment:

    872 turns into 127 (8+1=9, 7+2=9, 2+7=9)

    Take that number and add it to the second number in our equation:

    127 + 218 = 345

    Which gives you 345, now get its 9’s compliment and you have your answer:

    345 turns into 654 (3+6=9, 4+5=9, 5+4=9)


    In other words, 872 – 218 = 654 but I used only addition to find it!


    Now you can add all your subtractions to get the answer! Silly party trick, but it shows the power of 9 and the glorious complexity of God's system.

    By the way, anything multiplied by 9 sums to a product of 9.

    9 x 2 = 18 (1+8=9)
    145 x 99 = 14,355 (1+4+3+5+5=18 or 1+8=9)
     
    Cturtle likes this.
  2. Way to early for my brain to desire to function this way :) lol
     
    Fish Catcher Jim likes this.

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