#81
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Re: Sister\'s math problem X-post
[ QUOTE ]
[ QUOTE ] -------------------------------------------------------------------------------- I see it this way.... There is 1 way to group 7 "columns" 2 ways for 6 3 ways for 5 4 ways for 4 5 ways for 3 6 ways for 2 7 ways for 1 [/ QUOTE ] This is right. [ QUOTE ] and finally 1 big triangle [/ QUOTE ] This is the one way to group 7 columns, dont recount it. [ QUOTE ] (((1*7)+(2*6)+(3*5)+(4*4)+(5*3)+(6*2)+(7*1))*3)+1 ((7+12+15+16+15+12+7)*3)+1 ((84)*3)+1 252+1 253 [/ QUOTE ] Where did all this multiplication come from, there are 6 ways to group 2 so there are 6*2=12 possibilities??? NO, There are 6 you just said so. [/ QUOTE ] Uh, yeah..... [img]/images/graemlins/blush.gif[/img] whoops..... been a long day. |
#82
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Trapazoids
I think it's 84 also for trapazoids. You can't use the top row, but you can use row 2 by itself, 3 by itself, and 2&3 combined.
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#83
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Re: Trapazoids
[ QUOTE ]
I think it's 84 also for trapazoids. You can't use the top row, but you can use row 2 by itself, 3 by itself, and 2&3 combined. [/ QUOTE ] Ding, ding, ding, ding, ding!!! Gutter, tell her what's she's won. |
#84
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Re: Sister\'s math problem X-post
Good job guys! Now try this one:
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#85
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Re: Sister\'s math problem X-post
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[ QUOTE ] Blow me dildo. Nobody in 2+2 history annoys me more than you. [/ QUOTE ] Good luck in your sister's big upcoming race. [/ QUOTE ] holy crap i laughed my ass off at that. |
#86
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Re: Sister\'s math problem X-post
Its 84. I just counted it in 30 seconds. Count number in top row. Multiply by 3. Done. Basic math is easy.
This doesnt qualify as basic or math. It's counting. |
#87
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Re: Sister\'s math problem X-post
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(26!) is 26+25+24+23 etc... [/ QUOTE ] No. n! = n*(n-1)*(n-2)*...*1 It also has nothing to do with solving this problem. |
#88
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Re: Sister\'s math problem X-post
While brute force counting will solve the problem, there are quicker ways to solve it mathematically. What if there had been 100 columns instead of 7?
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#89
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Re: Sister\'s math problem X-post
[ QUOTE ]
[ QUOTE ] [ QUOTE ] Blow me dildo. Nobody in 2+2 history annoys me more than you. [/ QUOTE ] Good luck in your sister's big upcoming race. [/ QUOTE ] holy crap i laughed my ass off at that. [/ QUOTE ] it gave me a boner. |
#90
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Re: Sister\'s math problem X-post
It's obviously 84, but I'm really really interesting in seeing jakethebake or one of his minions graphically point out one of the hidden triangles. Will it be a trapezoid? Will it kill you in your sleep? Stay tuned!!
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