1. Mysterious number 6174
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Submitted by Anonymous on October 1, 2011

Article about Five Petals is there,
http://www.osaka-ue.ac.jp/zemi/nishiyama/math2010kr/five.pdf
http://www.osaka-ue.ac.jp/zemi/nishiyama/index.HTML
My approach is without Fibonaccis sequence.

Yutaka Nishiyama

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