Unit 1 Math Review

Prime/Composite

100

Is 13 prime or composite? Explain or show your reasoning.

Prime. Only 1x13=13.

200

Is 21 prime or composite? Explain or show your reasoning.

Composite. 7x3=21 and 1x21=21

300

Is 10 prime or composite? Explain or show your reasoning.

Composite. 1x10=10, 2x5=10

400

Is 17 prime or composite? Explain or show your reasoning.

Prime. Only 1x17=17.

500

Is 24 prime or composite? Explain or show your reasoning.

Composite. 1x24=24, 2x12=24, 3x8=24, 4x6=24

Factor Pairs

100

Find all the factor pairs for 6

1x6

2x3

200

Find all the factor pairs for 15

1x15

3x5

300

Find all the factor pairs for 19

1x19

400

Find all the factor pairs for 14

1x14

2x7

500

Find all the factor pairs for 18

1x18

2x9

3x6

True or False

100

True or False:

20 is a multiple of 5

True

5x4=20

200

True or False: 

12 is a factor of 6

False

300

True or False:

40 is a multiple or 10

True

10x40=40

400

The only factor pair for 25 is 1 and 25. 

False

5x5 also =25

500

True or False:

The factor pairs of 12 are 1 and 12, 2 and 6, and 3 and 4

True

Word Problems

100

Jaquell is playing cards with friends. The number of cards never changes, but the number of players does. 

With 5 players, the cards can be divided equally between the players. Could there be 35 cards? Explain or show your reasoning. 

Yes. Each player could have 7 cards.

200

Jaquell is playing cards with friends. The number of cards never changes, but the number of players does.

With 3 players, the cards can be divided equally between the players. Could there be 35 cards? Explain or show your reasoning.

No. 3 is not a factor of 35. 

300

Jaquell is playing cards with friends. The number of cards never changes, but the number of players does.

With 4 players, the cards can be divided equally between the players. How many cards COULD there be? Explain or show your reasoning.

Each player could have 12 cards because 4x3=12

OR 

8, 16, 20, 24, 28, 32, 36, 40...

400

DOUBLE POINTS

What is Mrs. Countryman's dogs name?

OR 

What is Ms. Bell's son's name?

Luka

Jordan

500

Jaquell is playing cards with friends. The number of cards never changes, but the number of players does.

With 6 players, the cards can be divided equally between the players. How many cards COULD there be? Explain or show your reasoning.

Each player could have 12 cards because 6x2=12

OR 

6, 18, 24, 30, 36, 42, 48, 54, 60...