Math Is Fun Forum

  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

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#26 Re: Jokes » Fibonacci » 2022-06-27 02:20:19

Hi Phil,

I'll say this in ganesh's style:

Welcome to the forum!

Good joke smile

#27 Re: Maths Is Fun - Suggestions and Comments » On improving the "Messaging" subsection of the Profile section » 2022-06-27 02:09:19

Hi,

I know this is a bit of an aside but still - it's surprising how dynamic the world of the internet is.

Personally,  I've never heard of these services mentioned above, with the sole exception of AOL, which we use as an inside joke among my friends to describe someone who just can't move on from the old,  lives in a shed with a cowboy hat - that sort of thing.

Today's mega giants - Discord, Reddit,  YouTube, Instagram,  Twitter even outlook or gmail! How long do they have?

I was a five year old when Skype and Yahoo were all the rage. Why did they stop? Why do any of these stop?

Is there a way to determine the decline of a certain app or website?

What are the factors behind this?

#28 Re: Help Me ! » Trigonometry Table » 2022-06-27 01:55:28

Hi Bob,

That would be very kind of you.

I find most sources,  like textbooks,  to either ramble about really basic knowledge, OR to skip many parts in a bid to be faster.

#29 Re: This is Cool » Library of Babel » 2022-06-27 01:51:42

Mycroft?  You mean Sherlock's brother,  who was the smarter of the two,  but too lazy to do anything?

#30 Re: Puzzles and Games » Hangman 1 » 2022-06-12 03:22:28

Yes, it’s quite clear by reading the old posts that this very forum used to be a rather vibrant and lively place.

Take your time about the celebration…it’ll be worth it!

No ‘e’? Well, then, how about ‘a’?

#31 Re: Exercises » Non - Routine Algebra » 2022-06-10 19:20:17

Ahoy there! I'm back!

Question 4

If x²+ 2x + 5 is a factor of x^4 + px² + q.

p, q =?

#32 Re: Puzzles and Games » Hangman 1 » 2022-06-10 19:14:17

I'd be worried if anyone remembered a word after that long, because that'd mean they had nothing better to do!

I'm looking forward to your celebratory post!

Is there an 'E' in your word?

#33 Re: Exercises » Non - Routine Algebra » 2022-05-20 18:03:11

Hi,

I was trying using this method:

I think it is almost the same method, just a little more direct.

#34 Re: This is Cool » Library of Babel » 2022-05-17 22:27:01

Hi,

I'm not sure what the matter with the reply above is.

To read the post, consider click on Quote.

I wonder if there's a certain number of characters which the forum can allow in a single post?

The post was ok before, but I decided to put the image numbers in hide tags to facilitate scrolling, and then this happened.

#36 Re: This is Cool » Library of Babel » 2022-05-17 18:40:43

Hi Mathegocart,

I remember adding a link to the website at the end of Post #1, but it seems to have disappeared. Thanks for mentioning it here!

Yes, a real life LOB would be incredibly impractical. I shouldn't be surprised if it doesn't fit in the area of Russia, with each building being the height of the Burj Khalifa.

All hail the Internet!

#37 Re: Exercises » Non - Routine Algebra » 2022-05-12 19:49:29

Hi Bob,

Thank you, that makes sense.

Here's the next question:

Question 3

If n! has 4 zeroes at the end.

(n+1)! has 6 zeroes at the end.

Find the value of n.

#38 Re: Exercises » Non - Routine Algebra » 2022-05-12 17:17:07

Hi Bob and phrontister,

Okay, so trial and error is the way to go. I was hoping there would be another method to do it, since this question was picked out of a strictly "no calculator allowed" exam.

But I suppose simultaneous equations would be very difficult in a case where the squares are involved.

#39 Re: This is Cool » Library of Babel » 2022-05-11 20:47:49

Wait...it is 42?

My friends and I use it all the time as a form of a joke. It's a funny way of saying "I don't know" to a question. You'll notice that I've used the number in the same way in my previous post.

To think it came from a book!

#40 Re: This is Cool » Library of Babel » 2022-05-11 18:43:21

Hi,

Ah, yes, the self-referential paradoxes. How could I forget?

I once specialized in confounding people at school with my bag of paradoxes.

I remember another of the same line, "A Trojan said, "All Trojans are liars." Is the Trojan lying?"

I definitely would avoid being the clean up guy if I could help it.

Bob wrote:

I should explain, the Guide is an electronic book containing loads of helpful advice for the hitch hiking space traveller, like where to get the best drinks and how to get a ride on a Vogan spaceship. It also has the helpful advice on the cover "Don't Panic".

Sounds like the best Guide ever. I wish every Guide said "Don't Panic." I'd probably panic more and cancel the trip, but no one can say the Guide didn't do its job.

But, by your words, it appears that it's a well known book, and yet it is completely new to me. Was it popular quite a few years ago?

Douglas Adams followed it up with 4 more books in the Trilogy (no error!).  I didn't find them so funny ... the original was delightfully different and full of zany ideas ... but there's only so many times you can tell the same joke.  If you like it, Adams also wrote two detective novels starring Dirk Gently, and these are equally wonderful (IMHO).

That's a lot of books. Looks like I have my next few vacations sorted smile

The question about Life, The Universe and Everything comes from the book and helps explain lots of things that puzzle the average human.

A book with the answer to Life, the Universe and Everything? And I won't like the answer? What is it, 42? big_smile

#41 Re: Exercises » Non - Routine Algebra » 2022-05-11 18:22:41

Hi Bob,

The answer is correct.

Could you give me a hint on how to solve it?

#42 Help Me ! » Pages of Novels » 2022-05-11 18:10:19

CurlyBracket
Replies: 1

A leaf is torn from a paper back novel.  The sum of the numbers on the remaining pages is 15000.

What are the page numbers on the torn leaf?

Hint, please!

#43 Re: This is Cool » Library of Babel » 2022-05-10 05:13:41

Hi,

I was thinking about this today, and I came to the conclusion that the idea of "cleaning up the false statements" is impossible.

I'll try to explain my logic the best I can.

Let's say I assign a person with the mammoth task of clearing up the false statements.

Then the Library of Babel, will be completely right, but only for that person at that particular moment.

Then an absolutely correct Library will have to be constructed for every single person who was, is and will be in existence, and it has to be updated every second.

For example:

Before this thread, I didn't know anything about the Hitch Hiker's Guide to the Galaxy.

So from my perspective, it did not exist.

But after ward, I learnt of it's existence, making it false.

This makes Bob's "The Library of Babel does not exist." also exist in a state of duality. Before reading this thread, it is possible that this sentence would have been perceived to be true by many, and false after reading.

So what if I write something like:

"XYZ, living in (address) did not believe in the existence of the Library of Babel, as precisely (time, date)"?

There is a possibility of there being another fellow of the same particulars, if not in this universe, then perhaps in another.

After all, in this discussion, we assume the same idea as good old Schrödinger, that each simple choice we make generates a whole new universe, where the other choice(s) have been selected.

What do you think?

P.S. My sincere regards to any one who has has the patience to read through this jumbled pile of a post.

#44 Re: Exercises » Non - Routine Algebra » 2022-05-04 15:31:24

I'm sort of unfamiliar with most spreadsheet functions, so this was something new for me.

Yes,  I can see the parallels between your solution and mine.

Here's the next question :

Question 2

A and B are two friends.

By subtracting B's age from the square of A,  we get 158.

On the other hand, by subtracting A's age from the square of B gives us 108.

What is A's age?

#45 Re: Exercises » Non - Routine Algebra » 2022-05-04 04:51:42

Well, here's how I went about it.

#46 Puzzles and Games » Phronaunsiashon » 2022-05-03 22:32:21

CurlyBracket
Replies: 1

Lukh aeth dees! Yiu khanut yoondherstan veedaoth phronoaunseeng dees!

Yeesn't aeth phanny?

Lath's ci haw menni pippael yoodherstan dees maesej. smile

#47 Re: Exercises » Non - Routine Algebra » 2022-05-03 21:44:53

Three cheers for Phrontister!  Hip Hip Hooray!

The answer is certainly perfect,  but how did you get this expression?

m=RIGHT(x+y+z-(ax+by+cx-2016)/3)

#48 Re: Help Me ! » Puzzles and Games » Addition Problem » 2022-05-03 21:41:28

Umm... Pardon me,  but isn't this thread an advertisement about a massaging chair?

#49 Re: Puzzles and Games » Rhyming Game » 2022-05-03 21:38:13

The Cat is Fat.

(I know,  I know... It's far too clichè)

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