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Math-Magic Home -> Number Sense Forum -> Number Sense Forum -> Magic Number
Post Info TOPIC: Magic Number
flowerbelly12


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Magic Number
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There is a positive number that has the following properties:


- If you add 1 to the number, you get its square.


- If you subtract 1 from the number, you get its reciprocal.


What is the number?



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Anonymous

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Is it the golden ratio?  (1+sqrt(5)) / 2

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webmaster


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Yep, that is correct.

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