What's your favourite paradox?

**aviator**

(07-29-2016, 02:08 PM)Greed^ Wrote:
(07-29-2016, 11:20 AM)aviator Wrote:
(07-29-2016, 10:46 AM)Greed^ Wrote: You must lack some brain cells
if 1 x = 0.999, then 10 * x = 9.99
now 9.99 - 0.999 = 8.991
You could also do 9*0.999 = 8.991

Basic math really

Indeed, he's the one lacking brain cells... I'm sure you noticed the ellipsis in his solution, see my post immediately above yours about this.

Yup

Lets take a look at what he wrote

(07-29-2016, 09:47 AM)franku Wrote:
(07-28-2016, 03:40 PM)aviator Wrote: -snip-

Did this recently as an addition to one of the topics I'm studying:
If 0.999... = x
9.999... = 10x
10x - x would give (9.999... - 0.999...) 9.
9x = 9 so x = 1.
so he says x = 0.999, and then 10*x = 9.999, but that's wrong (obviously he means in an infinite way, but this is for calculating it in a simple way), but 10 * 0.999 is not 9.999, but 9.99, which is as I mentioned before basic math, so that's where his calculations are wrong

You are correct, but it's irrelevant to the topic at hand. 10*0.999 is obviously 9.99. That's not the computation franku is doing however. Hence, he is indeed fully correct.