Read and understand each question carefully. Choose the letter of your answer.

1. These arw numbers with 2 factors only (one and itself).

A. Prime numbers
B. Even numbers
C. Composite numbers
D. Odd numbers

2. These are with more than two factors.

A. Prime numbers
B. Even numbers
C. Composite numbers
D. Odd numbers

3. What are the factors of 21?

A. 1, 2, 3, 4,
B. 1, 3, 21
C.1, 3, 7, 21
D. 3, 7, 9, 21


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