What are all the factors of 20?
1,2,4,5,10,20
Mr. Bertelsen wants to arrange his cards in rows. He has 15 cards. How many rows and columns could he have?
1 row of 15 or 15 rows of 1 or 3 rows of 5 or 5 rows of 3
Is 15 a prime or composite number? How do you know
Composite – it has more than 2 factors
Is 9 a prime or composite number? Explain your reasoning
Composite – it has more than 2 factors
List the first 5 multiples of 8.
8,16,24,32,40
Choose all the prime numbers 4, 6, 9, 11, 12, 17
11
What are the first 5 multiples of 2?
2,4,6,8,10
Is 37 a prime or composite number? Explain
Prime – it only has factors 1 and 37
What are all the factors of 56?
1, 2, 4, 7, 8, 14, 28, and 56.
Mr. Josh is setting up chairs for a school assembly. He arranges 8 chairs in each row. If he needs 7 rows of chairs, how many chairs will be used in total?
Ms. Ochs has 40 guitars. He wants to put them on display. What are all the possibilities of he rows of guitars he could make?
40 bags of 1 card 20 bags of 2 cards 10 bags of 4 cards 8 bags of 5 cards 5 bags of 8 cards 4 bags of 10 cards 2 bags of 20 cards 1 bag of 40 cards
Is 11 a prime or composite number? How do you know
Prime – it only has factors 1 and 11
Ms. Davis bakes 12 cupcakes in each batch. If she bakes 4 batches, how many cupcakes does she bake in total?
Is 29 a prime or composite number? Explain
Prime – it only has factors 1 and 29