Factors & Multiples
Question: What are all the factors of 12?
Answer: What are 1, 2, 3, 4, 6, and 12?
This number is prime: 2, 3, 5, or 9?
What are 2, 3, and 5? (All except 9 are prime)
Complete this equation: 7 × ___ = 56
What is 8?
5 students each brought 3 pencils. How many pencils total?
What is 15 pencils? (5 × 3 = 15)
Complete: 6 × ___ = 36
What is 6?
Name two multiples of 8.
What are 16, 24, 32, 40, 48, 56, 64, 72, 80, etc.? (Any two correct multiples)
The smallest prime number.
What is 2?
If David is 12 years old and his grandma is 5 times older, write the equation to find grandma's age.
What is 12 × 5 = 60?
there are 36 markers in 4 equal columns. How many markers in each column?
What is 9 markers? (36 ÷ 4 = 9)
If 1 student needs 8 folders, how many folders do 2 students need?
What is 16 folders?
This number has exactly two factors: 1 and itself.
What is a prime number?
This number is composite because it has factors 1, 2, 4, 5, 10, and 20.
What is 20?
Jalen picked 20 flowers, which is 4 times as many as Andre. Which equation shows this: 20 × 4 = f or 20 = 4 × f?
What is 20 = 4 × f?
The equation 9 × 7 = 63 could mean "63 crayons are 9 times the 7 crayons at the green table." True or false?
What is true?
Complete: ___ × 8 = 80
What is 10?
All the factors of this number are: 1, 2, 3, 4, 6, 8, 12, and 24.
What is 24?
Name a prime number between 10 and 20.
What are 11, 13, 17, or 19?
A dress costs 2 times as much as a $19 sweater. Write and solve the equation.
What is 19 × 2 = $38?
5 students brought 3 packs of paper each. The class needs 8 times that amount. How many packs total?
What is 120 packs? (5 × 3 = 15, then 15 × 8 = 120)
In a ratio table, if 1 student needs 8 folders and 5 students need 40 folders, how many folders do 9 students need?
What is 72 folders? (9 × 8 = 72)
Is 15 prime or composite? Explain why.
What is composite? (Because 15 has factors other than 1 and itself: 1, 3, 5, and 15)
Explain why 1 is neither prime nor composite.
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What is "1 only has one factor (itself), but prime numbers need exactly two factors"?
A video game costs $36 and a DVD costs $9. How many times more does the game cost than the DVD?
What is 4 times more? (36 ÷ 9 = 4)
Students are split into 2 groups. Hawks group: 5 students with 3 pencils each. Eagles group: 5 students with 5 pencils each. They share equally among all 10 students. How many pencils per student?
What is 4 pencils per student? ((5×3) + (5×5)) ÷ 10 = 40 ÷ 10 = 4)
Find the missing dimension: A rectangle has area of 45 sq. inches and one side is 9 inches long. How long is the other side?
What is 5? (45 ÷ 9 = 5)