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Is this mathematical idea actually true (see inside)? - ç‹â´²å¿ Tadashi - 04-04-2014 07:45 AM
From @UntoldSecrets on Twitter:
"If you take any number, double it, add 10, divide by 2, and substract the original number, the answer is always 5."
Now tried that with 10, and it worked.
But does it really work with any number?
- ted s - 04-04-2014 07:57 AM
certainly ; n ---> 2n---> 2n + 10 -----> [2n+10]/2 = n+ 5---> 5
- Mathmom - 04-04-2014 08:03 AM
Of course, this is simple algebra:
x ---> double it = 2x
2x ----> add 10 = 2x + 10
2x + 10 ----> divide by 2 = (2x+10)/2 = x + 5
x + 5 ----> subtract original number = (x+5)−x = 5
- Hammed - 04-04-2014 08:09 AM
yes it is correct for every number
[(2n + 10)/2] - n = 5
that is the mathematical expression
n + 5 - n = 5
hence
5 = 5
so for every number the answer will be 5
- Jeff - 04-04-2014 08:13 AM
yes
- Mysterious MUSE - 04-04-2014 08:21 AM
Yes as you are deleting the original number so you are only dealing with 10 which you divide by 2.
- David M - 04-04-2014 08:31 AM
(2n+10)/2
n+5
subtract original
5
- Uncle Wayne - 04-04-2014 08:47 AM
replace the 10 with a 20 and ===== you will always land up with 10.
((((Mysterious Muse))))
- ç‹ Josh - 04-04-2014 08:57 AM
JESUS is the answer. (not always the correct answer but, it's still an answer)
Entering Jesus into the equation will also give you 5