Add new comment

Permalink Submitted by Anonymous (not verified) on 9 November, 2017

Hi, the ISBN of your book includes number 6174. This was by chance or you selected it?

The Mysterious Number 6174; One of 30 Amazing Mathematical Topics in Daily Life
ISBN-13: 978-4768761748, ISBN-10: 4768761747

About text formats

Filtered HTML

  • Web page addresses and email addresses turn into links automatically.
  • Allowed HTML tags: <a href hreflang> <em> <strong> <cite> <code> <ul type> <ol start type> <li> <dl> <dt> <dd>
  • Lines and paragraphs break automatically.