# Math Riddles

chess kid1
Posers and Puzzles 10 Aug '06 19:36
1. 10 Aug '06 19:36
Hi everybody. Please suggest any riddle to this thread. (If it is a Math Riddle, that is...)
2. 10 Aug '06 20:43
Originally posted by chess kid1
Hi everybody. Please suggest any riddle to this thread. (If it is a Math Riddle, that is...)
Here's a good one:

Why is six so very afraid?
3. 10 Aug '06 21:22
Originally posted by FreakyKBH
Here's a good one:

Why is six so very afraid?
Can u RedHotPawn - mail the answer to me? I want to post it on some other website. ðŸ™‚
4. BigDoggProblem
Just...the Dogg
10 Aug '06 22:15
Originally posted by chess kid1
Can u RedHotPawn - mail the answer to me? I want to post it on some other website. ðŸ™‚
Oh lordy, you're terrorizing multiple websites. ðŸ˜²
5. Bowmann
Non-Subscriber
10 Aug '06 22:52
What's going on here? It looks silly.
6. 11 Aug '06 00:35
Originally posted by FreakyKBH
Here's a good one:

Why is six so very afraid?
Because seven ate nine
7. 11 Aug '06 00:35
Hardly "good" or a maths problem...
8. XanthosNZ
Cancerous Bus Crash
11 Aug '06 01:201 edit
You attend a party along with N other people. Given any group of 4 party-goers you can be sure that at least one of the 4 knows the other three. Prove that at least one person knows all others at the party.

EDIT: I have saved this thread.
9. 11 Aug '06 01:36
Originally posted by XanthosNZ
You attend a party along with N other people. Given any group of 4 party-goers you can be sure that at least one of the 4 knows the other three. Prove that at least one person knows all others at the party.

That'll teach him!
10. XanthosNZ
Cancerous Bus Crash
11 Aug '06 01:49
Originally posted by ThudanBlunder
That'll teach him!
They wanted math they'll get math.
11. 11 Aug '06 01:52
Originally posted by XanthosNZ
You attend a party along with N other people. Given any group of 4 party-goers you can be sure that at least one of the 4 knows the other three. Prove that at least one person knows all others at the party.

EDIT: I have saved this thread.
Why save a chesskid thread? Why didn't you make another one? WHY!? ðŸ˜€
12. 11 Aug '06 05:46
Originally posted by thespacemonkey
Because seven ate nine
No. Because seven eight nine, I think.
13. 11 Aug '06 05:48
Originally posted by ThudanBlunder
That'll teach him!
That'll teach who?
14. 11 Aug '06 10:08
assume that no guest knows all the other guests. then each guest does not know (at least) one other person. since in any group of 4 people you must know at least 1 there are a maximum of 2 strangers per guest. now according to our assumption if i pick a random guest A from the party there Exists guest B such that A,B are strangers. now we pick a third guest C if A,B,C are all strangers then they've reached their maximum of two strangers each so any fourth guest D must know them all (If there are only 4 guests then we are done) but again according to our assumption there Exists a fifth guest E who is a stranger to D. take the group A,B,D,E. A is a stranger to B who is a stranger to A and D is a stranger to E who is a stranger to D, this contradicts the assumption so at least one guest knows everyone.

in fact this shows that if A,B,C are all strangers then all the other guests know everyone at the party.
15. 11 Aug '06 12:48
Originally posted by chess kid1
That'll teach who?
That'll teach you to ask for maths riddles. ðŸ˜›