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Author Topic:   Math Riddles!
portmaster1000
Inactive Member


Message 1 of 19 (142524)
09-15-2004 12:06 PM


Bored and looking for some fun riddles. Lots of websites with math riddles but sometimes I'd like a way to ask for hint without getting the whole answer.
I'll start us off with a classic.
What rule was used to order the following sequence of numbers?
8, 5, 4, 9, 1, 7, 6, 3, 2, 0
Riddle Me This
PM1K

Replies to this message:
 Message 2 by Rei, posted 09-15-2004 1:19 PM portmaster1000 has replied

  
Rei
Member (Idle past 7013 days)
Posts: 1546
From: Iowa City, IA
Joined: 09-03-2003


Message 2 of 19 (142530)
09-15-2004 1:19 PM
Reply to: Message 1 by portmaster1000
09-15-2004 12:06 PM


That's easy - I didn't even have to cheat. They're arranged in alphabetical order.
Eight, Five, Four, Nine, One, Seven, Six, Three, Two, Zero
E
Fi
Fo
N
O
Se
Si
T
Z

"Illuminant light,
illuminate me."

This message is a reply to:
 Message 1 by portmaster1000, posted 09-15-2004 12:06 PM portmaster1000 has replied

Replies to this message:
 Message 3 by portmaster1000, posted 09-15-2004 3:13 PM Rei has replied
 Message 17 by portmaster1000, posted 09-16-2004 12:19 PM Rei has not replied

  
portmaster1000
Inactive Member


Message 3 of 19 (142555)
09-15-2004 3:13 PM
Reply to: Message 2 by Rei
09-15-2004 1:19 PM


Answer one - give one
Yeah it was kinda easy.
Please reciprocate with an additional one
thanx
PM1K

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Rei
Member (Idle past 7013 days)
Posts: 1546
From: Iowa City, IA
Joined: 09-03-2003


Message 4 of 19 (142564)
09-15-2004 3:58 PM
Reply to: Message 3 by portmaster1000
09-15-2004 3:13 PM


Re: Answer one - give one
Well... I've already posted my favorite one (the "Monty Hall" problem) on evc before, so I'll have to come up with a different one... Too bad the topic is "Math Riddles" instead of just "riddles" Hmm...

"Illuminant light,
illuminate me."

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Percy
Member
Posts: 22394
From: New Hampshire
Joined: 12-23-2000
Member Rating: 5.2


Message 5 of 19 (142575)
09-15-2004 4:49 PM


Another Sequence
What are the rules that produced this sequence:
10000000000
1101221
100000
13044
4424
2662
2000
1357
1024
...
--Percy

Replies to this message:
 Message 6 by Minnemooseus, posted 09-15-2004 5:07 PM Percy has replied

  
Minnemooseus
Member
Posts: 3941
From: Duluth, Minnesota, U.S. (West end of Lake Superior)
Joined: 11-11-2001
Member Rating: 10.0


Message 6 of 19 (142578)
09-15-2004 5:07 PM
Reply to: Message 5 by Percy
09-15-2004 4:49 PM


Re: Another Sequence
Don't have the time (or brains) to check, but my guess is:
2^10 in base 2
2^10 in base 3
2^10 in base 4
2^10 in base 5
2^10 in base 6
2^10 in base 7
2^10 in base 8
2^10 in base 9
2^10 in base 10
Moose
This message has been edited by Adminnemooseus, 09-15-2004 04:10 PM

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 Message 8 by Percy, posted 09-15-2004 5:22 PM Minnemooseus has not replied

  
Loudmouth
Inactive Member


Message 7 of 19 (142579)
09-15-2004 5:18 PM
Reply to: Message 6 by Minnemooseus
09-15-2004 5:07 PM


Re: Another Sequence
quote:
Don't have the time (or brains) to check, but my guess is:
Once I figured out how to do non-base 10 digits, 2^10 in base 9 checks out. I could already do binary, and that checked out too.
How about we make a new rule for us math genius wannabes : base 10 numbers only?

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Percy
Member
Posts: 22394
From: New Hampshire
Joined: 12-23-2000
Member Rating: 5.2


Message 8 of 19 (142580)
09-15-2004 5:22 PM
Reply to: Message 6 by Minnemooseus
09-15-2004 5:07 PM


Yet Another Sequence
Show off!
How about this:
4 5 5 6 14 11 8 11 8 8 13 17 16 16 12 5 5 ...
--Percy

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Percy
Member
Posts: 22394
From: New Hampshire
Joined: 12-23-2000
Member Rating: 5.2


Message 9 of 19 (142583)
09-15-2004 5:28 PM
Reply to: Message 7 by Loudmouth
09-15-2004 5:18 PM


Re: Another Sequence
I guess I could let everyone think I'm a number-base genius, but to figure things like this out:
102410 = 60A13
All I need to do is this:
unix% bc
obase=13
1024
60A
--Percy

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Minnemooseus
Member
Posts: 3941
From: Duluth, Minnesota, U.S. (West end of Lake Superior)
Joined: 11-11-2001
Member Rating: 10.0


Message 10 of 19 (142588)
09-15-2004 5:43 PM
Reply to: Message 9 by Percy
09-15-2004 5:28 PM


Off topic comment on Percy's avatar
I say we rip his tongue out.
Re: Bloom County - In one Bill the Cat story line, Bill was in a terrible car crash, and all that survived was his tongue. Oliver cloned a new Bill from the tongue.
Now back to the numbers.
Moose

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Primordial Egg
Inactive Member


Message 11 of 19 (142591)
09-15-2004 6:16 PM


This might be an oldie, but its a goodie:
1, 11, 21, 1211, 1231, 131221, ?
what's the next number?
PE

Replies to this message:
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One_Charred_Wing
Member (Idle past 6156 days)
Posts: 690
From: USA West Coast
Joined: 11-21-2003


Message 12 of 19 (142609)
09-15-2004 7:41 PM


What the heck are you guys saying?! You're making me feel like an idiot again...

  
jar
Member (Idle past 394 days)
Posts: 34026
From: Texas!!
Joined: 04-20-2004


Message 13 of 19 (142612)
09-15-2004 7:59 PM


Another oldie. Please explain the sequence.
8, 5, 4, 9, 1, 7, 6, 3, 2

Aslan is not a Tame Lion

Replies to this message:
 Message 14 by Percy, posted 09-15-2004 9:07 PM jar has replied

  
Percy
Member
Posts: 22394
From: New Hampshire
Joined: 12-23-2000
Member Rating: 5.2


Message 14 of 19 (142620)
09-15-2004 9:07 PM
Reply to: Message 13 by jar
09-15-2004 7:59 PM


Isn't that where this thread started?
--Percy

This message is a reply to:
 Message 13 by jar, posted 09-15-2004 7:59 PM jar has replied

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jar
Member (Idle past 394 days)
Posts: 34026
From: Texas!!
Joined: 04-20-2004


Message 15 of 19 (142621)
09-15-2004 9:11 PM
Reply to: Message 14 by Percy
09-15-2004 9:07 PM


What goes around. Guess I'm just trapped on the wheel.

Aslan is not a Tame Lion

This message is a reply to:
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