Welcome to your Factors and Multiples(Study by Topics Junior Class) NAME EMAIL PHONE NUMBER 1. What are the first three prime numbers? 0, 1, 2 None of the above 2, 3, 5 1, 2, 3 2. Find the HCF of 63 and 90. 3 6 9 12 3. Find the LCM of 6ab and 5b². 30ab² 36ab² 30b² 3ab² 6ab 4. Which is the greatest common factor of 45 and 60? 45 15 5 30 5. Which number is a factor of 111? 11 9 3 21 6. Of the following list of numbers : 2,3,4,7,8,11,12, which are Composite numbers? 4,11,12 2,3,7 2,3,4 4,8,12 7. The lowest common multiple, or LCM, of 4 and 7 is 8. Find the HCF of 8xy and 24y². xy² 8xy 8y 3y 3xy 9. Which set of numbers are all Primes? 33, 29, 41, 3 5, 23, 11, 37 None of the above 63, 71, 43, 81 10. The number 1 is _______ Both a Prime and Composite number A Prime number A Composite number Neither a Prime or Composite number 11. The factors of 24 include 15, 30, 48 1, 5, 12 1, 6, 9 1, 8, 12 12. What are all of the factors of 84? 1, 2, 3, 4, 7, 12, 21, 42, 84 2, 3, 7 1, 2, 4, 21, 42, 84 1, 2, 3, 4, 7, 12, 21, 28, 42, 84 13. The first three multiples of 8 are 2,3,8 8, 16, 24 None of the above 16, 24, 32 14. Which number below is the highest common factor, or HCF, of the numbers 24 and 36? 6 5 12 3 15. Six has all the following factors... 2, 4, 6 3, 4, 5 3, 6, 12, 18 1, 2, 3, 6 16. The factors of 36 include... 1, 6, 36 2, 4, 8 12, 15, 36 1, 13, 18 17. What is the LCM of ab^{2} and a^{2}b^{3}? ab a²b³ a²b² a²b ab² 18. The factors of 28 are.. 7, 14, 21 1, 6, 28 1, 2, 4, 7, 14, 28 2, 4, 7, 14 19. Find the HCF of 5y, 30xy, and 40ay. 75y 75ay3x 120y 40ay 5y 20. A number is a multiple of 6 if _____ The sum of all of its digits is divisible by 6 The sum of all its digits is divisible by 3 and the last digit is even Its last two digits form a number divisible by 6 The last digit is 6 1 out of 20 Time is Up! Time's up