The Magic Cafe Forum Index » » Magical equations » » Help on a math problem please!!! (0 Likes)

 Walking Bob Elite user 489 Posts Posted: Apr 23, 2009 10:05 pm      0 My daughter came home with what I think is a pretty tough math assignment. It may take some magic to solve but I though maybe someone would have some ideas. She needs to make a true subtraction problem using the numbers 1 - 9. All numbers must be used and can be used only once. Sample give was 486 -359 _________ 127 Any help or ideas would be appreciated. She needs 15 examples. Thanks and have a nice day, Walking Bob in Iowa Scott Cram Inner circle 2677 Posts Posted: Apr 23, 2009 11:08 pm    0 If she's allowed to get creative, how about: Code:``` .486
-.359
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.127``` Code:``` 4.86
-3.59
-----
1.27``` Code:``` 48.6
-35.9
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12.7``` BTW, if you have Martin Gardner's 3rd book, New Mathematical Diversions, check out Chapter 19 ("Nine More Problems"), where approaches to a similar problem are discussed in detail. There are some solutions discussed in that article, including: Code:``` 972
-654
-----
318``` and Code:``` 567
-438
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129``` Heck, if you want a computer to solve it for you, go to the Alphametics Puzzle Solver, and type in for the summand words: ABC DEF For the sum word enter: GHK You'll get the answers as addition problems, but that's easily turned around to a subtraction problem. Also, some of the solutions presented will use a 0, and that sounds like it's not allowed in the assigned problem, so make sure to skip those. Grey Matters:Blog|Videos|Mental Gym|Presentation|Store Walking Bob Elite user 489 Posts Posted: Apr 24, 2009 07:09 pm      0 Thanks Scott for the ways to solve this problem. Walking Bob The Magic Cafe Forum Index » » Magical equations » » Help on a math problem please!!! (0 Likes)
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