The document outlines assignments and lessons for a math class. It lists factors of 16 and the sum of the first 7 prime numbers as warm up problems. It then provides information on tests for divisibility by 2, 5, 10, 3, and 9. Example problems are given to demonstrate applying the divisibility rules.

1. lesson 21.notebook October 16, 2012
Assignment:
1-->Set 21 (odds) - Due Tomorrow (10/17)
2-->Test #3 - Friday (10/19)
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2. lesson 21.notebook October 16, 2012
Lesson 21 WarmUp:
1) List the factors for 16.
2) What is the sum of the first 7 prime numbers?
3) If two hundred fifty-two is the dividend and six is
the quotient, what is the divisor?
4) Simplify: 1234 60
5) What is the average of 1, 2, 4, and 9?
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3. lesson 21.notebook October 16, 2012
Lesson 21:
*Tests for divisibility:
2-->if the last digit is even
5-->if the last digit is a 5 or 0
10-->if the last digit is 0
3-->if the sum of the digits is divisible by 3
9-->if the sum of the digits is divisible by 9
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4. lesson 21.notebook October 16, 2012
Lesson 21 Examples:
pg. 114
A) 234
B) 3456
C) 120-->
D) 102-->
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