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#1 2006-01-12 02:38:07

goggles1980
Member
Registered: 2006-01-12
Posts: 1

Puzzle

Which number doesn't belong in this set?

73, 83, 86, 93

Obvious (ie. 86 because it's even) ? Or am I missing a deeper meaning of these numbers?

Another one, this one is for sure difficult.

What is depicted by the following:

    8
u u u u   
u u u

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#2 2006-01-12 04:16:31

mathsyperson
Moderator
Registered: 2005-06-22
Posts: 4,900

Re: Puzzle

That's the problem with puzzles like that. You give a perfectly sensible answer, and then the designer of the puzzle says that the actual answer is something different and complex and feels really proud of themselves, even though they're actually just being childish.

e.g. What comes next in this sequence? A, A, A, A, A...?

Any sane person would answer A, but nooooo... the idiot who calls themselves a puzzle-maker says 'no yore rong cos its acshully the first leter of the continants lol'

Anyway, your answer is fine. It's probably not the intended one, but it's certainly the simplest.

The second puzzle is harder. I can't think of anything right now, but I'll keep pondering for a while.


Why did the vector cross the road?
It wanted to be normal.

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#3 2006-01-12 09:35:54

MathsIsFun
Administrator
Registered: 2005-01-21
Posts: 7,552

Re: Puzzle

73 and 83 are primes, 86 and 93 are composite, so it isn't that.

And the other puzzle? Something to do with the eight being over 7 "u"s. They might look like "c" sideways? Seven Seas?

BTW: I like your continents one!


"The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  - Leon M. Lederman

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#4 2006-01-12 13:20:17

Ricky
Moderator
Registered: 2005-12-04
Posts: 3,791

Re: Puzzle

Heres one:  what comes next in this sequence:

9, 10, 11, 12, 13, 14...

Once you've looked that, try to guess the pattern...


"In the real world, this would be a problem.  But in mathematics, we can just define a place where this problem doesn't exist.  So we'll go ahead and do that now..."

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#5 2006-01-12 21:12:21

justlookingforthemoment
Moderator
Registered: 2005-05-26
Posts: 2,161

Re: Puzzle

goggles1980 wrote:

8
u u u u   
u u u

Maybe something to do with 'you underrate'?

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#6 2006-01-14 17:36:20

ganesh
Moderator
Registered: 2005-06-28
Posts: 15,159

Re: Puzzle

Sensible thinking. But why 7 'u's?


Character is who you are when no one is looking.

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#7 2006-01-17 07:30:16

Zach
Member
Registered: 2005-03-23
Posts: 2,075

Re: Puzzle

In return to Rod's C theory; 8 Continents over Seven Seas.


Boy let me tell you what:
I bet you didn't know it, but I'm a fiddle player too.
And if you'd care to take a dare, I'll make a bet with you.

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#8 2006-01-17 10:18:18

mathsyperson
Moderator
Registered: 2005-06-22
Posts: 4,900

Re: Puzzle

But where do you get 'continents' from?

This is just an idea, but as they're c's on their side, it might be something do to with seaside.


Why did the vector cross the road?
It wanted to be normal.

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#9 2012-12-08 12:32:25

mathaholic
Member
From: Juliania
Registered: 2012-11-29
Posts: 2,895
Website

Re: Puzzle

I bet it's 86. Because the other 3 numbers end in 3.


"What is the square root of 2? 1.4141592653589793238" Seriously, I thought it was that. Too round?
3.141592653589793238...

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#10 2012-12-14 21:22:18

mathaholic
Member
From: Juliania
Registered: 2012-11-29
Posts: 2,895
Website

Re: Puzzle

Or it is 83 'cause it is prime.


"What is the square root of 2? 1.4141592653589793238" Seriously, I thought it was that. Too round?
3.141592653589793238...

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#11 2012-12-14 22:50:59

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,657

Re: Puzzle

Well, 73 is also prime...


“Here lies the reader who will never open this book. He is forever dead.

“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

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