1. 
Simplify the expression . > 12

2. 
Prime factorize 2520. > 2^{3} × 3^{2} × 5 × 7

3. 
Find the least common multiple of 16 and 128. > 128

4. 
Find the greatest common factor of 54 and 126. > 18

5. 
Simplify the expression . > 17

6. 
Prime factorize 2221. > 3^{2} × 7^{3}

7. 
Find the least common multiple of 14, 18, and 20. > 1260

8. 
Find the greatest common factor of 34, 68, and 85. > 34

9. 
Maisy wears a particular pair of jeans every four days. She wears her favorite sweatshirt every six days. If she wore them both together today, when will she wear them together again next? > In 12 days

10. 
The least common multiple of two numbers is 600, and the greatest common factor of the same numbers is 20. What are the numbers? > 100 and 120
