# Number Theory & Prime Factorization Chapter Exam

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

### Page 1

#### Question 1 1. What is the least common multiple of 27 and 12?

#### Question 2 2. Find the LCM of 5 and 20.

#### Question 3 3. What is the prime factorization of 4050?

#### Question 4 4. What is the least common multiple of 24 and 92?

#### Question 5 5. What is the shorthand way of writing the least common multiple?

### Page 2

#### Question 6 6. Find the LCM of 13 and 15.

#### Question 7 7. What is the prime factorization of 420?

#### Question 8 8. Which sequence of numbers below is a list of multiples?

#### Question 9 9. What is the prime factorization of 32?

#### Question 10 10. Write 0.00057 in scientific notation.

### Page 3

#### Question 11 11. What is the least common multiple of 8 and 33?

#### Question 12 12. Write 7,500,000 in scientific notation.

#### Question 13 13. A factor is defined as the different numbers that can be multiplied together to arrive at the original number. Which choice below is the complete list of factors of 30?

#### Question 14 14. Find the GCF of 9 and 45.

#### Question 15 15. Which of the following is a prime number?

### Page 4

#### Question 16 16. For which of the number pairs below could you NOT use the shortcut of simply multiplying the two numbers together to find the LCM?

#### Question 17 17. Which of these is scientific notation?

#### Question 18 18. Find the GCF of 15 and 35.

#### Question 19 19. Find the GCF of 12 and 25.

#### Question 20 20. What is the least common multiple of 12, 18 and 22?

### Page 5

#### Question 21 21. Which of the following is a prime number?

#### Question 22 22. What is the least common multiple of 18 and 42?

#### Question 23 23. In which of the following situations would it be most useful to use scientific notation?

#### Question 24 24. Which of the following is NOT a way to begin the factor tree for 1230?

#### Question 25 25. What number is 1.23 x 10^4?

### Page 6

#### Question 26 26. What is the short way to write the greatest common factor?

#### Question 27 27. Which of the following is a composite number?

#### Question 28 28. Which of the following is NOT a prime number?

#### Question 29 29. A prime number is a number that can only be divided by _____ and the number itself.

#### Question 30 30. Which of the following is a composite number?

#### Number Theory & Prime Factorization Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!