Sven's Official BrainTeaser Thread !! and Sander.

[Sander]

mike with your equation you will get 0.9999 with infinite nines after the dot. so it gets extremely close to 1 but will never be so

[TW89]

No. 3 was to use the dirt and pile it up and stand on that. Few got it or near enuff.

Someone else do one now lol.  :thumbsup:

[Mike]

mike with your equation you will get 0.9999 with infinite nines after the dot. so it gets extremely close to 1 but will never be so

0.999... is exactly equivalent with 1.

[SvenF]

mike with your equation you will get 0.9999 with infinite nines after the dot. so it gets extremely close to 1 but will never be so

0.999... is exactly equivalent with 1.

Yes because 1/3=0.333..., 2/3=0.666... and 3/3=0.999... but 3/3 is also equivalent with 1. So 0.999...=1.

[NMelvynN]

i have one i want to share with you guys, but can i post it now or should i wait until this one is done?

[SvenF]

i have one i want to share with you guys, but can i post it now or should i wait until this one is done?

Just go ahead, the last one is quite old already and nobody has solved it.. :dontknow:

[NMelvynN]

So here it goes:

4 legs on 4 legs.
4 legs waiting for 4 legs.
4 legs doesn't come, 4 legs leave, 4 legs stays....

The question is, what are the 4 legs...(a little "hint" : think of tom and jerry)


some of u might know it but it is quite hard to think on this one...

[Sander]

So here it goes:

4 legs tomon 4 legstable.
4 legs tomwaiting for 4 legs.jerry
4 legsjerry doesn't come, 4 legstom leave, 4 legstable stays....

The question is, what are the 4 legs...(a little "hint" : think of tom and jerry)


some of u might know it but it is quite hard to think on this one...

i think it's like this

mike with your equation you will get 0.9999 with infinite nines after the dot. so it gets extremely close to 1 but will never be so

0.999... is exactly equivalent with 1.

i disagree, you miss 0.0000001  (the amount of zeroes is than the same as the amount of nines in the other number)

[Mike]

x=0.999...
10x=9.999...
10x-x=9.999...-0.999...
9x=9
x=1
1=0.999...

1/9=0.111...
9*1/9=9*0.111...
9/9=0.999...
1=0.999...


Something, which is infinitely close to something, is just right on it. 0.3999...=0.4 i.e

[Sander]

Something, which is infinitely close to something, is just right on it. 0.3999...=0.4 i.e

well you said it yourself  :thumbsup: it's close so it's not exactly it. there's a infinite small number between 0,9999.. and 1

but mike to tell you the truth, i'm not really sure who's right. your and svens equations look right, but my arguements must be good too to you (i hope). i'll ask my mathteacher after the holidays ;)

[SvenF]

Something, which is infinitely close to something, is just right on it. 0.3999...=0.4 i.e

well you said it yourself  :thumbsup: it's close so it's not exactly it. there's a infinite small number between 0,9999.. and 1

but mike to tell you the truth, i'm not really sure who's right. your and svens equations look right, but my arguements must be good too to you (i hope). i'll ask my mathteacher after the holidays ;)

My mathteacher told me what I wrote before.. :dontknow: I think yours will say the same, although I understand what you mean.

[Sander]

Something, which is infinitely close to something, is just right on it. 0.3999...=0.4 i.e

well you said it yourself  :thumbsup: it's close so it's not exactly it. there's a infinite small number between 0,9999.. and 1

but mike to tell you the truth, i'm not really sure who's right. your and svens equations look right, but my arguements must be good too to you (i hope). i'll ask my mathteacher after the holidays ;)

My mathteacher told me what I wrote before.. :dontknow: I think yours will say the same, although I understand what you mean.

well i've had a discussion with him about something similar. pick a random number between 0 and 1. (0,5  0,34829   whatever) then take the squareroot of it. then take the squareroot of that answer over and over again. you'll get numbers that get higher and higher and will get 0,999999999 eventually. then if you do that on your calculator it will say 0,999999 for a couple of times but eventually it says 1. i asked my teacher why because i was (and still ;)) convinced that 0,999999 is not 1. he said that the calculator needed to round it off after a while because there are too many digits