Sven's Official BrainTeaser Thread !! and Sander.

[Gustav]

There's no such definition of an "exact number"

Read this instead:

http://en.wikipedia.org/wiki/Number#Integers

Go to "real numbers".

You missed the math in school so now you sitting in front of the computer and reading wikipedia ..... the problem is man that you don't understand the thing you reading, you´re like "oh shit this seems to be real "

have you ever heard of solving an equation " exact" ?

[Gustav]

We're not discussing about 0.0 and 0 in terms of rounding of.

But with your logic;

-0.5<=0>0.5
-0.05<=0.0>0.05
-0.005<=0.00>0.005

then 0 is most likely to be > 0.0

Not correct with what I said

[Mike]

Duuh. To solve an equation exact is about not rounding of. If you solve something and it is exactly equivalent with 0.0, then it's exactly 0 as well.

You thought it was hard to understand the part of real numbers?
"Thus 1.0 and 0.999... are two different decimal numerals representing the natural number 1. There are infinitely many other ways of representing the number 1, for example 2/2, 3/3, 1.00, 1.000, and so on.".
What is it that you think is hard to understand really?

Still having math's in school, kiddo. You made a definition of an exact number, which I had never stumbled upon, so I looked it up. Seemed as there were no definition of it :nopity: .

But not being able to handle the number "0", might be a problem for you in school though.

[Mike]

We're not discussing about 0.0 and 0 in terms of rounding of.

But with your logic;

-0.5<=0>0.5
-0.05<=0.0>0.05
-0.005<=0.00>0.005

then 0 is most likely to be > 0.0

Not correct with what I said

That's because what you say is not correct.

[Gustav]

We're not discussing about 0.0 and 0 in terms of rounding of.

But with your logic;

-0.5<=0>0.5
-0.05<=0.0>0.05
-0.005<=0.00>0.005

then 0 is most likely to be > 0.0

Not correct with what I said

That's because what you say is not correct.

I said this wasn't the case when you have an exact number, in this case 0 . .

[VG]

the best definition i could find of an exact number:

EXACT  NUMBERS

 

Certain types of numbers are considered “exact.”  For example, there are exactly 16 ounces in one pound.  The number 16 would have as many significant figures as needed.  So one pound has 16.000000000000.... ounces.  Calculations involving this number should not be limited by the significant figures shown in “16 oz/lb.”  For example, if we want to calculate how many ounces are in 2.0 lb, we would set up the problem thus:

The answer has 3 sig. fig. even though 16 appears as 2 sig. fig..  The answer is limited by 2.00 lb (3 sig. fig.) and not by 16 because it is an “exact” number.  In the same way, the answer is not limited by “1” in “1 lb” because that, too, is an exact number.

 

Which types of numbers are considered “exact?”  Below are the general rules.

1.  Conversions between units within the English System are exact.

      e.g. 12 in = 1 ft  or  12 in/1 ft      (In this conversion, 12 and 1 are both exact.)

 

2.  Conversions between units within the Metric System are exact.

      e.g. 1 m = 100 cm or 1 m/100 cm       (In this conversion, 1 and 100 are both exact.)

 

3.  Conversions between English and Metric system are generally NOT exact.  Exceptions will be pointed out to you.

      e.g. 1 in = 2.54 cm exactly                 (1 and 2.54 are both exact.)

      e.g. 454 g = 1 lb  or  454 g/1 lb         (454 has 3 sig. fig., but 1 is exact.)

 

4.  “Per” means out of exactly one.

      e.g. 45 miles per hour means 45 mi = 1 hr or 45 mi/1 hr.          (45 has 2 sig. fig. but 1 is exactly one.)

 

5.  “Percent” means out of exactly one hundred.

      e.g. 25.9% means 25.9 out of exactly 100 or 25.9/100 (25.9 has 3 sig. fig., but 100 is exact.)

 

6.  Counting numbers are exact.  Sometimes it is hard to decide whether a number is a “counting number” or not.  In most cases it would be obvious.  Ask when in doubt.

e.g.   There are 5 students in the room.  (5 would be an exact number because you cannot have a fraction of a student in the room.)

and 0.9 recurring does equal 1 whereas 0.9999999999999 doesn't afaik

[Mike]

You popped out of no where, I like that.

From where did you get that, if I may ask?

[Gustav]

You popped out of no where, I like that.

From where did you get that, if I may ask?

http://letmegooglethatforyou.com/?q=exact+number

[Mike]

Thank you :thumbsup:

[NMelvynN]

guys u want a new one? it's a funny one

or should i wait till the answer for this one is solved?

[Gustav]

guys u want a new one? it's a funny one

or should i wait till the answer for this one is solved?

We will never have thesame opinion in this one so post the new one...  :banana:

[VG]

oops nvm got the wrong end of the stick anyway i revise my opinion and i think in this case mike is right