
1. 
EASY

What are the factors of 12?
 1, 2, 3, 4, 6, 12
 2, 3, 4, 6
 1, 2, 4, 6, 8, 12
 1, 3, 6, 12
 1, 12

2. 
MEDIUM

A number's factors, excluding the number itself, are: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, __ . What is the last factor?

3. 
MEDIUM

What are the factors of 87?
 1, 87
 87, 1
 1, 3, 27, 87
 1, 3, 29, 87
 None of the above

4. 
MEDIUM

What is the product of the all factors of 12?

5. 
HARD

If a is a factor of b, then are all the factors of a factors of b?
 Yes
 No
 Only if the factor isn't a prime
 Only if the factor is a prime
 Cannot determine

6. 
HARD

What is the sum of the factors of 117?

