Home Getting Started Answer Try These Think About This... Did You Know? Resources
Challenge 41 - Radar Bills
Do you have a Figure This!
radar bill
in your pocket?
Paper money, such as dollar bills, with serial numbers that read the same backwards as forwards are sometimes called
Helix magnifier
Need A Hint?
Symmetry and repeating patterns are crucial to the study of mathematics. Artists, scientists, and designers all use these properties in their work.
handle
Home Getting Started Answer Try These Think About This Did You Know? Resources
Try Another Challenge Challenge Index Math Index · Printing the Challenges En Español
Family Corner Teacher Corner About Figure This! · Purchase the CD
©2004 National Council of Teachers of Mathematics
Web site and CD-ROM design/production
© 1999-2004 KnowNet Construction, Inc.