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Factors and Multiples Test Review

Bell Ringer: Page 43 in JBHM binder (DOK 2)

Focus/Introduction: We are reviewing today for a test tomorrow on divisibility rules, prime/composite numbers, factors, and multiples.

Let’s review the divisibility rules.

What is a…. Prime number- Composite number-

What is a… Factor: Common Factor: Greatest Common Factor: Multiple: Common Multiple: Least Common Multiple:

Which number is divisible by all of the numbers 2, 3, 5, and 10? (DOK 2) a) 10 b) 20 c) 30 d) 40

Which of the following is a prime number? (DOK 1) a) 3 b) 4 c) 6 d) 8

Elijah’s teacher asked him to write the first five multiples of 4 on his paper. If Elijah was correct, which of these lists could have been on his paper? (DOK 1) a) 4, 8, 10, 12, 16 b) 2, 4, 6, 8, 10 c) 4, 6, 8, 10, 12 d) 4, 8, 12, 16, 20

Steve earned $24 and Jan earned $72 mowing family members’ yards. If they earned the same amount of money per yard, which of these represent the greatest dollar amount they could have earned for each yard? (DOK 3) a) $8 b) $12 c) $16 d) $24

Which number is not prime? (DOK 1) a) 1 b) 2 c) 3 d) 5

Which of these are prime factors of 20? (DOK 2) a) 2 and 4 b) 5 and 10 c) 4 and 5 d) 2 and 5

If a number is not divisible by 2, which other rules can be automatically eliminated? (DOK 2) a) 3 b) 5 c) 6 d) 9

The combination to Louis’s lock has 3 numbers. The first number is prime. The second number is composite. The third number is neither prime nor composite. Which of the choices could be his combination? (DOK 2) a) b) c) d) 2 4 1

The mystery number is divisible by 2, 3, 6, and 5. Which number could be the mystery number? (DOK 3) a) 80 b) 90 c) 100 d) 105

Which of the following numbers has 8 as a factor and as a multiple? (DOK 2) a) 1 b) 2 c) 8 d) 16

Which of the following is a list of all factors of 100? (DOK 1) a) 1, 2, 4, 25, 50, 100 b) 100, 200, 300, 400 c) 1, 2, 4, 5, 10, 20, 25, 50, 100 d) 1, 2, 3, 4, 5, 10, 20, 25, 50, 100

Gary says that all prime numbers are even. Hank says that all prime numbers are odd. Jeremiah says that there are 4 prime numbers between 1 and 10. Who is correct? (DOK 2) a) Gary b) Hank c) Jeremiah d) They are all incorrect.

Which of the following is the greatest common factor of 6 and 12? (DOK 2) a) 1 b) 3 c) 6 d) 12

Which number is a multiple of every number? (DOK 1) a) 1 b) 2 c) 3 d) None of the above

Bess wants each of her 3 grandchildren to have the same amount of money. What is the smallest amount of money that can be given to each one if one is given all dimes, another all nickels, and another all quarters? (DOK 2) a) 45¢ b) 50¢ c) 70¢ d) 75¢

Shondra says that 1 is prime. Rufus says that 1 is composite. Who is correct? (DOK 1) a) Shondra b) Rufus c) Both are correct. d) Both are incorrect.

Closure: Remember that you have a test tomorrow on these concepts. Factors, Multiples, Prime, and Composite numbers Study tonight for homework.