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What number, when used to represent all numbers, can be used to represent something else?

To get credit you need the number and the reason behind it.

EDIT1:

Given the answers so far I feel I should clarify a couple of things.

  • "Used to represent all numbers" in this context would be closer in meaning to "Used as a symbol to represent the set of all numbers" than "Used for its property of containing all numbers".
  • This puzzle focusses on play-on-words mechanics more than maths mechanics.

EDIT2:

To be clear, the only things you need to solve this puzzle is a dictionary and a knowledge of numbers in the number line. Any maths above that is too much.

EDIT3:

A possibly improved wording?

What number, when used to represent all numbers, is a tame anagram of itself?

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  • $\begingroup$ I'm hoping this isn't the case, is it rot13(vasvavgl)? $\endgroup$ – Adam May 20 at 21:20
  • $\begingroup$ @Adam Nope. I'm not even sure what the meaning of what you wrote is? Though, I am curious about it. $\endgroup$ – user3303504 May 21 at 21:20
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    $\begingroup$ @user330504 The text that Adam wrote is encoded by rot13. If you decode it, it will become clear what he is saying. $\endgroup$ – Bewilderer May 21 at 21:22
  • $\begingroup$ It would be helpful if people who downvote could leave a comment telling me how I might improve future puzzles! Thanks. $\endgroup$ – user3303504 May 21 at 21:22
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    $\begingroup$ I think people are downvoting because the puzzle is too broad and has several answers, a few of which I’ve listed below. $\endgroup$ – MichaelMaggs May 21 at 21:59
3
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Is the number

PI π

Because

It is said to contain every number in its digits and it also reminds everyone of pie!

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3
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I think the number is

e

Reason:

It is the mathematical constant e, where e is an irrational and transcendental number and it can represent all numbers(2.71828182845904523536028747135266249775724709369995...) $$$$ It is the base of the natural logarithm(Representing something else).

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2
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This has many answers, depending what is meant by 'the set of all numbers' including:

R = real numbers, N = Natural numbers, Z = integers, C = complex numbers. All of those letters have several other meanings as well.

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    $\begingroup$ Thanks for the feedback. I've tried to be more open / explicit regards to the maths required to solve the puzzle, but would appreciate feedback if I've over/under-stepped the mark. $\endgroup$ – user3303504 May 21 at 22:46
  • $\begingroup$ @user3303504 I think that the natural next step is to expand the puzzle itself. A well crafted puzzle doesn't need extra explanation or additional context (your edits) for a solver to logically arrive at the answer, everything is apparent from the get-go. Similar puzzles to this commonly face the same problem and that is the lack of 'information' (loosely using this term). Some careful word choice and bloating of the puzzle can be really effective in adding vague scraps of 'information' which in turn reduces the risk of unintentional well-fitting answers $\endgroup$ – Adam May 21 at 23:31
  • $\begingroup$ @Adam Thanks for the feedback. I've had a few chats over this and updated the puzzle with a (hopefully) improved rewording. Would you say I'm headed in the right direction? (I've also been told to look into Q&A's for cryptic crosswords to get more of a feel for these types of puzzles). $\endgroup$ – user3303504 May 22 at 21:40
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In case curious eyes cross this puzzle again in the future, the answer is:

4. The idea was that a number being used to represent many other numbers was kind of meta. If the number used is 4, then you get meta-4, which sounds like metaphor. The question can also be considered a metaphor for a metaphor... which is kind of meta...

Thank you for all the constructive feedback! I will endeavour to make a better puzzle next time.

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  • $\begingroup$ Now that you have shared the answer, I get why it was difficult to make into a puzzle. It is a great idea for a puzzle, with the answer I can now give proper feedback. The words 'used' and 'represent' are the problem (from "used to represent all numbers"). With the answer in mind, it makes perfect sense however the puzzle didn't exactly convey that there was more to the number than just itself so solvers probably won't be able to naturally solve this in its current state (good use of wordplay tag though). It is interesting, cannot wait to see more from you! $\endgroup$ – Adam May 25 at 20:13
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    $\begingroup$ @Adam Thanks for the additional feedback! I'll keep this in mind for future puzzles. Its quite difficult to see a path from zero information when you have all of the information, but I find it to be a fun puzzle by itself. I've got another one uploaded here if you're interested =) puzzling.stackexchange.com/questions/84360/… $\endgroup$ – user3303504 May 25 at 20:35
-5
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Credit card has all the numbers and FICo Score represents all the credit card quality..you need it to get credit..represents the quality of trust the card companies place in you.

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    $\begingroup$ Can you explain why you think this is the answer to the puzzle? Answers without explanation may be deleted. $\endgroup$ – Deusovi May 20 at 21:31
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    $\begingroup$ I know that you have answered few questions so I want to take this chance to inform you that it is common to hide parts of your answer using a spoiler block. To use a spoiler block you simply start a line with ">!". Happy answering! $\endgroup$ – Adam May 20 at 21:48

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