Question

read page 95 for help on this. decide if each number is prime (only multiple is 1 and itself) or composite (has more then the two multiples)
4 choose
7 choose
9 choose
27 choose
33 choose
11 choose
3 choose
43 choose
53 choose
12 choose

Explanation:

Step1: Define prime/composite

A prime number has only 1 and itself as factors; a composite number has more than two factors.

Step2: Evaluate 4

Factors: $1,2,4$ → composite

Step3: Evaluate 7

Factors: $1,7$ → prime

Step4: Evaluate 9

Factors: $1,3,9$ → composite

Step5: Evaluate 27

Factors: $1,3,9,27$ → composite

Step6: Evaluate 33

Factors: $1,3,11,33$ → composite

Step7: Evaluate 11

Factors: $1,11$ → prime

Step8: Evaluate 3

Factors: $1,3$ → prime

Step9: Evaluate 43

Factors: $1,43$ → prime

Step10: Evaluate 53

Factors: $1,53$ → prime

Step11: Evaluate 12

Factors: $1,2,3,4,6,12$ → composite

Answer:

4: Composite
7: Prime
9: Composite
27: Composite
33: Composite
11: Prime
3: Prime
43: Prime
53: Prime
12: Composite