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6th-8th Grade Math: Number Theory Chapter Exam

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!

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Question 1 1. Which one is the largest?

Question 2 2. Which of the following is a composite number?

Question 3 3. Which one is the smallest?

Question 4 4. What is the short way to write the greatest common factor?

Question 5 5. In which of the following situations would it be most useful to use scientific notation?

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Question 6 6. Write 7,500,000 in scientific notation.

Question 7 7. What is the least common multiple of 8 and 33?

Question 8 8. Which of these is scientific notation?

Question 9 9. Which of the following is a prime number?

Question 10 10. Find the GCF of 12 and 25.

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Question 11 11. Which of the following is a composite number?

Question 12 12. What is the prime factorization of 4050?

Question 13 13. Which sequence of numbers below is a list of multiples?

Question 14 14. Find the LCM of 5 and 20.

Question 15 15. What is the prime factorization of 24 with exponents?

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Question 16 16. Sam has 40 blue balloons and 30 white balloons. He wants to split each set of balloons equally. What is the largest number of groups that Sam can split the balloons into so that both the blue balloons and the white balloons are shared equally between the groups? The number of blue and white balloons in each group do not have to match.

Question 17 17. 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 18 18. What is the prime factorization of 420?

Question 19 19. Which of the following is a prime number?

Question 20 20. Write 0.00057 in scientific notation.

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Question 21 21. What is the prime factorization of 32?

Question 22 22. What number can you divide a prime number evenly by besides itself?

Question 23 23. What is the least common multiple of 18 and 42?

Question 24 24. Which one is the smallest?

Question 25 25. What is the prime factorization of 4?

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Question 26 26. What is the least common multiple of 12, 18 and 22?

Question 27 27. Which number is the largest?

Question 28 28. Which of the following is not in scientific notation?

Question 29 29. Find the GCF of 15 and 35.

Question 30 30. Jake makes $10 dollars an hour and Judy makes $15 dollars an hour. What is the smallest check they can receive so that both their earnings match?

6th-8th Grade Math: Number Theory 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!

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