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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 Math Goodies CD, which has a total of 124 in-depth lessons, plus extensive libraries of worksheets, games and puzzles. You get self-paced instruction designed to make math fun! |
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| Copyright © 1998-2009 Gisele Glosser. All Rights Reserved. |