CAHSEE Math Problem of the Day -- Week 10

CAHSEE Math Problem of the Day -- Week 10
Teacher Notes & Answers
• You may choose to have students do an additional practice problem for Day 1.
Additional Practice:
Which of the following is the prime factored form of the lowest common denominator of
A 3 x 7
B 3 x 3 x 7
C 7 x 9
D 21 x 9
The factors of 21 are: 3 x 7
The factors of 9 are: 3 x 3
The factors in the Lowest Common Denominator are 3 x 3 x 7
Since 9 is not a prime number answer C can not
be the correct answer.
• Have students do the CAHSEE released test item on Day 1 of the student CAHSEE
Math Problem of the Day -- Week 10 worksheet.
23. Which of the following is the prime factored form of the lowest common
denominator of
A 5 x 1
B 2 x 3 x 5
C 2 x 5 x 3 x 5
D 10 x 15
The prime factors of 10 are 2 x 5
The prime factors of 15 are 3 x 5
The Lowest Common Denominator is 2 x 3 x 5
Laura Westermeier, Ed.D. Fall 2007
SAUSD, Educational Services Week 10 – Teacher - Page 2 of 10