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Activity
National Council of Teachers of Mathematics

Nctm: Figure This: Tournaments

For Students 9th - 10th
Math activity challenges you to find out how many more games need to be played in the modern 1999 NCAA tournament during March Madness than in 1985?
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Handout
Varsity Tutors

Varsity Tutors: Hotmath: Algebra Review: Perfect Numbers

For Students 9th - 10th Standards
Find a quick, concise explanation of perfect numbers. Examples are given and clearly explained.