Homework Help: Math 213 Elementary Math

Posted by Shay on Friday, August 7, 2009 at 4:05pm.

20. Think of a number.
Add 7.
Double the result.
Subtract 8.
Double the result.
Add 12.
Divide by 4.
Subtract 6.
Your answer will be the original number. Explain how this trick works.

Math 213 Elementary Math - drwls, Friday, August 7, 2009 at 4:18pm
If 20 is the answer, what is the question?
20 is not a question

Answer this Question

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