Welcome to your Factors and Multiples(Study by Topics Junior Class) NAME EMAIL PHONE NUMBER 1. Find the HCF of 5y, 30xy, and 40ay. 120y 40ay 75y 75ay3x 5y 2. All of the factors for the number 12 are: 1,2,3,4,6,12 False True 3. A factor tree is a great way for us to find the prime factors, or prime factorization, of a number. False True 4. Which of the following correctly lists the factors of the number 28? 2,4,7,14 1,2,4,7,14,28 1,2,3,4,5 1,28 5. The first three multiples of 8 are 2,3,8 8, 16, 24 None of the above 16, 24, 32 6. What are all of the factors of 84? 1, 2, 4, 21, 42, 84 1, 2, 3, 4, 7, 12, 21, 28, 42, 84 2, 3, 7 1, 2, 3, 4, 7, 12, 21, 42, 84 7. Which number is a factor of 111? 21 9 11 3 8. Find the LCM of 6ab and 5b². 30b² 3ab² 36ab² 6ab 30ab² 9. What are the first three prime numbers? 1, 2, 3 2, 3, 5 None of the above 0, 1, 2 10. The numbers 20 and 30 have which of the following common factors 2,4,5,6,10 2,3,4,5,6,10 2,4,5,10 2,3,4,5,10 11. Which pair of numbers has 60 as their least common multiple? 30 and 45 10 and 6 12 and 30 40 and 60 12. Which list is made up of multiples of 4? 12, 22, 28 8, 16, 36 4, 14, 24 1, 4, 40 13. What is the LCM of ab2 and a2b3? ab² a²b ab a²b³ a²b² 14. What is the greatest common factor of 12 and 18? 4 9 2 6 15. Which is the greatest common factor of 45 and 60? 45 5 30 15 16. Which set of numbers are all Primes? 33, 29, 41, 3 63, 71, 43, 81 None of the above 5, 23, 11, 37 17. A number is a multiple of 6 if _____ Its last two digits form a number divisible by 6 The sum of all its digits is divisible by 3 and the last digit is even The sum of all of its digits is divisible by 6 The last digit is 6 18. How many multiples does 10 have? An infinity 9 100 4 19. Which of the following is a multiple of 16? 64 8 88 27 20. How many factors does a Prime number have? 1 3 2 4 1 out of 20 Time is Up! Time's up