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| Challenge Exercises: Number Theory | Home > Lesson Library | |||
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| Name one prime number from 70 and 79. The number 279 is composite. Name a number other than 1 and itself that is a factor of 279... |
| This lesson is now available only on The Math Goodies CD. Our CD has over 275 web pages of self-paced instruction designed to make math fun! |
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| Copyright © 1998-2007 Gisele Glosser. All Rights Reserved. |