Math Forum Internet News

Volume 2, Number 28

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 14 July 1997                                 Vol. 2, No. 28


 Numeroscope | 9th Grade NASA Math Test | Non-English Math


The Numeroscope is a multi-media, interactive laboratory
for exploring number systems that form the basis for
mathematical cryptography. It uses exotic number systems 
to illuminate the meaning of familiar algebraic operations 
such as +, -, x, /, sqrt, and log.

The modules offer lab activities and discussion topics:

 - Addition and Multiples: When counting 'wraps around'
 - Multiplication, Powers, and Logarithms: How clock numbers 
    behave under multiplication; a discrete logarithm problem
 - Factoring - Coiling up Clock Numbers; factoring out the
    influence of primes
 - Applications to Cryptography (RSA): The multiplicative 
    structure of clocks with pq hours (p,q prime)
 - "Donut" Numbers - The Square Root: clock numbers and 
    'imaginary' roots
 - Galois Numbers - Solving Polynomial Equations: creating 
    larger number systems by imagining solutions to more
    complicated polynomial equations

You will need a Java-capable browser to use the Numeroscope.



Practice questions for the Ohio ninth grade proficiency test
from the Information Infrastructure Technology and Applications
(IITA) K-12 Program of the NASA Lewis Research Center in
Cleveland, Ohio. Thirty-nine questions help build skills in
addition, multiplication, problem-solving, and algebra.
Explanations why possible answers are correct or incorrect
are included, and a question that tests comprehension of basic
concepts follows each incorrect answer.

In addition to a Teacher's Resource Center, this site also 
features a Wind Tunnel Aeronautics Activities project that
offers experiments and lesson plans designed to help 
explain some of the basic principles of aeronautics. 
Answers to problems and Space Mathematics Worksheets are 



As a virtual center for mathematics on the Internet, the
Math Forum strives to be an international site. We know
that not all our users are native speakers of English, so
our Internet Resource Collection includes pages of math
resources in languages other than English. You can find
them by using our searcher to look for French or German
or Spanish:

In addition, we have begun to develop pages of links to
math resources from French- and Spanish-speaking countries, 
and we welcome your suggestions for additions:


If you have or know of collections of math resources in other
languages, we'd be happy to add them to our Non-English 
Language Resource page:


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Sarah Seastone, Editor