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| Cool Math Tricks https://www.mlbppworld.com/viewtopic.php?f=1&t=3880 |
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| Author: | Zumikaku [ Tue Nov 24, 2009 9:16 pm ] |
| Post subject: | Cool Math Tricks |
This math "wizard" guy just visited our school today. He taught us all kinds of tricks like the magic square, how to figure out what day of a week a date was, and How to figure out the last 3 numbers on someone's drivers license. I'm going to do the magic square trick for you. Give me any number between 100 and 300 that ends in 0 or 5, and I'll fill a 5X5 square with numbers so that every row, column, and diagonal adds up to the number you chose. Who wants to give me a number first? |
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| Author: | LightningMan117 [ Tue Nov 24, 2009 9:36 pm ] |
| Post subject: | Re: Cool Math Tricks |
170. |
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| Author: | Zumikaku [ Tue Nov 24, 2009 9:53 pm ] |
| Post subject: | Re: Cool Math Tricks |
Code: 50 57 34 41 48
56 38 40 47 49 37 39 46 53 55 43 45 52 54 36 44 51 58 35 42 |
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| Author: | stevenjackson39 [ Tue Nov 24, 2009 9:58 pm ] |
| Post subject: | Re: Cool Math Tricks |
I have a puzzle i'd like to share, if you don't mind 7 7 7 = 100 add two signs (+, -, ., etc.) to make this statement true. |
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| Author: | Zumikaku [ Tue Nov 24, 2009 10:02 pm ] |
| Post subject: | Re: Cool Math Tricks |
Closest I can get is (7+7) * 7 = 98 |
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| Author: | cooldude1045 [ Tue Nov 24, 2009 10:26 pm ] |
| Post subject: | Re: Cool Math Tricks |
Are you sure there aren't 4 sevens? |
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| Author: | ChiCubsFan4 [ Tue Nov 24, 2009 10:31 pm ] |
| Post subject: | Re: Cool Math Tricks |
Zumikaku wrote: Code: 50 57 34 41 48 56 38 40 47 49 37 39 46 53 55 43 45 52 54 36 44 51 58 35 42 Those columns add up to 230, not 170. |
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| Author: | Zumikaku [ Tue Nov 24, 2009 10:39 pm ] |
| Post subject: | Re: Cool Math Tricks |
Oh, crud. I skipped a step. Here we go: Code: 38 45 22 29 36
44 26 28 35 37 25 27 34 41 43 31 33 40 42 24 32 39 46 23 30 |
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| Author: | PowerPro Jr [ Tue Nov 24, 2009 11:06 pm ] |
| Post subject: | Re: Cool Math Tricks |
258. |
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| Author: | Zumikaku [ Tue Nov 24, 2009 11:21 pm ] |
| Post subject: | Re: Cool Math Tricks |
It has to end in 5 or 0. |
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| Author: | Longball714 [ Wed Nov 25, 2009 12:42 am ] |
| Post subject: | Re: Cool Math Tricks |
stevenjackson39 wrote: I have a puzzle i'd like to share, if you don't mind 7 7 7 = 100 add two signs (+, -, ., etc.) to make this statement true. I remember that one and cooldude is right, it's supposed to be 7 7 7 7 = 100. |
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| Author: | ChiCubsFan4 [ Wed Nov 25, 2009 12:50 am ] |
| Post subject: | Re: Cool Math Tricks |
I give up on that one, someone tell me. (In a PM so it doesn't ruin it for anyone else) |
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| Author: | Zumikaku [ Wed Nov 25, 2009 10:16 am ] |
| Post subject: | Re: Cool Math Tricks |
Longball714 wrote: stevenjackson39 wrote: I have a puzzle i'd like to share, if you don't mind 7 7 7 = 100 add two signs (+, -, ., etc.) to make this statement true. I remember that one and cooldude is right, it's supposed to be 7 7 7 7 = 100. Do we get 3 signs then? hmm... I can still only get to 98 |
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| Author: | Longball714 [ Wed Nov 25, 2009 2:26 pm ] |
| Post subject: | Re: Cool Math Tricks |
Nope, you only have two signs parentheses, decimals, radicals, exponents, absolute value, etc., also count as signs |
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| Author: | Zumikaku [ Wed Nov 25, 2009 3:23 pm ] |
| Post subject: | Re: Cool Math Tricks |
OK, does a pair of parentheses count as 1 or 2? And do the ones you don't use combine to 77? (like this: 7 + 77 + 7). |
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