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

Walking Bob
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489 Posts

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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
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If she's allowed to get creative, how about:

Code:
 .486
<br>-.359
<br>-----
<br> .127


Code:
 4.86
<br>-3.59
<br>-----
<br> 1.27


Code:
 48.6
<br>-35.9
<br>-----
<br> 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
<br>-654
<br>-----
<br> 318


and

Code:
 567
<br>-438
<br>-----
<br> 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.
Walking Bob
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Elite user
489 Posts

Profile of Walking Bob
Thanks Scott for the ways to solve this problem.

Walking Bob
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