Brain Teaser

0.9 repeating is equal to 1
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True or False?
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True

 

If rounded it is true. If not rounded this is false. No matter how many 9's it will never equal 1.

Finished.

 

no it isnt cuz its 0.999999999999 not one but if u had to round it like renagade said then yes

 

Smart and cute? ^_^

I didn't get it, I'm not a math wizzy.. and I'm 17

But cool teaser Clash

EDIT: its 1:34 in the morning.. I"m a little rusty <_< :lol:

 

how is this a brain teazer i think my brother learned this 4 years ago hes 13 now

 

Honestly, that isn't hard... I learned rounding in 5th grade.

 

no, see

.9 repeating is infact equal to 1, when not rounded

here,

set x=.9 repeating


Multiply both x and .9 repeating by 10 and you get


10x=9.9 repeating

subtract both sides by x and you get

9x=9

x=9/9

x=1

 

If you do the mumble jumble, it'll equal 1.. Confusing. :blink:

http://en.wikipedia.org/wiki/Proof_that_0.999..._equals_1

 

subtract both sides by x and you get

9x=9

Lies, you don't know the value of X and you subtracted 10 down to 9.

 

TRUE...

look at this

1/9=.1111111111......
2/9=.2222222222.......
3/9=.333....
4/9=.4444...
5/9=.5555555.....
6/9=.666666.....
7/9=.77777.....
8/9=.888888.......
9/9=?

 

Psssssh.... Not my fault I failed math.. My teachers all hated me.

 

Math sucks balls

 

Yep...also...1/3=0.3 rep. 2/3-0.6 rep. 1/3+2/3=3/3 or 1... .3rep+.6rep=.9rep

 

that doesn't work. youre assuming that .999.... is equal to 1 when you subtract it. so it would be

8.9(repeating)x=9

 

Rounding?