Skip to main content
Toggle navigation
Secondary menu
about Plus
support Plus
Plus sponsors
subscribe to Plus
terms of use
Search form
Search
Home
Articles
News
Packages
Podcasts
Puzzles
Reviews
Videos
Login
Kaprekar's operation
Mysterious number 6174
6174 is a very mysterious number.
Yutaka Nishiyama
explains why, and how beautiful mathematical oddities can inspire us to discover new mathematics.
Read more...