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 Posted: Wed May 17, 2006 8:17 am
Riddle Corner
Ok, so it's not really all that science related, but riddle are fun. ^_^ If you know of any good ones feel free to post them here so that we can all try and solve them.
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Posted: Tue May 23, 2006 3:23 am
A math one:
you have two numbers, let's call them A and B.
You know A.B = 12 and A - B = 8.
Try to compute A^2 + B^2 without computing A nor B.
((If you don't find it and want the solution, PM me))
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Posted: Tue May 23, 2006 1:11 pm
The_Bartner A math one: you have two numbers, let's call them A and B. You know A.B = 12 and A - B = 8. Try to compute A^2 + B^2 without computing A nor B. ((If you don't find it and want the solution, PM me)) it can either be 145*A^2 or 145*B^2
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Posted: Sat May 27, 2006 7:24 pm
AstronomyGirl The_Bartner A math one: you have two numbers, let's call them A and B. You know A.B = 12 and A - B = 8. Try to compute A^2 + B^2 without computing A nor B. ((If you don't find it and want the solution, PM me)) it can either be 145*A^2 or 145*B^2 There is an exact solution when you use a special theorem about squares
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Posted: Sun May 28, 2006 8:23 am
The_Bartner AstronomyGirl The_Bartner A math one: you have two numbers, let's call them A and B. You know A.B = 12 and A - B = 8. Try to compute A^2 + B^2 without computing A nor B. ((If you don't find it and want the solution, PM me)) it can either be 145*A^2 or 145*B^2 There is an exact solution when you use a special theorem about squares hum... yea that's what I was thinking, that there was an exact solution. humm... I'm stupped then. I don't think I can figure this out. sweatdrop
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Posted: Sun May 28, 2006 1:25 pm
AstronomyGirl The_Bartner AstronomyGirl The_Bartner A math one: you have two numbers, let's call them A and B. You know A.B = 12 and A - B = 8. Try to compute A^2 + B^2 without computing A nor B. ((If you don't find it and want the solution, PM me)) it can either be 145*A^2 or 145*B^2 There is an exact solution when you use a special theorem about squares hum... yea that's what I was thinking, that there was an exact solution. humm... I'm stupped then. I don't think I can figure this out. sweatdrop Hint: use: (A-B)^2 = ... (you know something about that normally) (written in white so you you don't have to read it, select to read, then it becomes blue)
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Posted: Sun May 28, 2006 8:46 pm
The_Bartner Hint: use: (A-B)^2 = ... (you know something about that normally) (written in white so you you don't have to read it, select to read, then it becomes blue) I think I got it! that hint helped a lot! a^2 + b^2 = 52(highlight it to see my answer) Did I get it?
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Posted: Thu Jun 01, 2006 3:52 pm
AstronomyGirl The_Bartner Hint: use: (A-B)^2 = ... (you know something about that normally) (written in white so you you don't have to read it, select to read, then it becomes blue) I think I got it! that hint helped a lot! a^2 + b^2 = 52(highlight it to see my answer) Did I get it? Almost, I know which mistake you have made... (highlight it to see extra hint) 52 = 64 - 12, but the right answer is 64 + 2.12
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Posted: Thu Jun 01, 2006 6:36 pm
The_Bartner Almost, I know which mistake you have made... (highlight it to see extra hint) 52 = 64 - 12, but the right answer is 64 + 2.12huh? ... ok I dont' get it then... xp
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Posted: Sat Jun 03, 2006 2:33 pm
Solution in white on the next lines:
(A-B)^2 = A^2 + B^2 - 2.A.B
=> ( 8 )^2 = A^2 + B^2 - 2.12
<=> 64 + 2.12 = A^2 + B^2
<=> A^2 + B^2 = 88
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Posted: Sun Jun 04, 2006 11:06 am
The_Bartner Solution in white on the next lines: (A-B)^2 = A^2 + B^2 - 2.A.B
=> ( 8 )^2 = A^2 + B^2 - 2.12
<=> 64 + 2.12 = A^2 + B^2
<=> A^2 + B^2 = 88oh! I get it now. blaugh In that last post where you had 2.12 I thought you ment the number two decimal one two, and so I was trying to figure out how you got the decimal number. Now I see that you ment two multiplied by twelve. xp lol. Just a mix-up with notation. I usually use * to mean multiplication when I'm typing stuff on the computer instead of the .
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Posted: Fri Jun 16, 2006 10:47 am
AstronomyGirl The_Bartner Solution in white on the next lines: (A-B)^2 = A^2 + B^2 - 2.A.B
=> ( 8 )^2 = A^2 + B^2 - 2.12
<=> 64 + 2.12 = A^2 + B^2
<=> A^2 + B^2 = 88oh! I get it now. blaugh In that last post where you had 2.12 I thought you ment the number two decimal one two, and so I was trying to figure out how you got the decimal number. Now I see that you ment two multiplied by twelve. xp lol. Just a mix-up with notation. I usually use * to mean multiplication when I'm typing stuff on the computer instead of the . I use the * * for RP's, when doing an action, and the most used mathematical notion is a point, but it is indeed a bit confusing, sorry...
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Posted: Fri Jun 16, 2006 10:55 am
Next riddle !
A boy and a girl each choose a number between one and five. They're both as intelligent as possible.
I take a look at both numbers and tell them the numbers are different.
1 The boy says: I don't know whether my number is the biggest or smallest.
2 Then the girl says: Well, I don't know either.
3 After that the boy says: I know your number now and I know mine is smaller than yours.
4 Then the girl says: Now I know your number too.
Which number has the girl and which the boy?
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Posted: Sat Jun 17, 2006 1:45 pm
The_Bartner AstronomyGirl The_Bartner Solution in white on the next lines: (A-B)^2 = A^2 + B^2 - 2.A.B
=> ( 8 )^2 = A^2 + B^2 - 2.12
<=> 64 + 2.12 = A^2 + B^2
<=> A^2 + B^2 = 88oh! I get it now. blaugh In that last post where you had 2.12 I thought you ment the number two decimal one two, and so I was trying to figure out how you got the decimal number. Now I see that you ment two multiplied by twelve. xp lol. Just a mix-up with notation. I usually use * to mean multiplication when I'm typing stuff on the computer instead of the . I use the * * for RP's, when doing an action, and the most used mathematical notion is a point, but it is indeed a bit confusing, sorry... ah. Yea I use * * for RP's as well. Never had to use any multiplication in any RP's yet though. blaugh That's ok though. I know that from now on.
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Posted: Sat Jun 17, 2006 1:48 pm
The_Bartner Next riddle ! A boy and a girl each choose a number between one and five. They're both as intelligent as possible. I take a look at both numbers and tell them the numbers are different. 1 The boy says: I don't know whether my number is the biggest or smallest. 2 Then the girl says: Well, I don't know either. 3 After that the boy says: I know your number now and I know mine is smaller than yours. 4 Then the girl says: Now I know your number too. Which number has the girl and which the boy? o_0 this is tough.. I have no idea... Need some time to think about this one...
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