basic math skills

Chapter 2 Practice Test

Mastery Test A

BASIC MATH SKILLS

DIRECTIONS: LIST THE SET OF ALL FACTORS OF THESE NUMBERS

1. F20 – 1, 2, 4, 5, 10, 20

2. F24 – 1, 2, 3, 4, 6, 8, 12, 24

3. F15 – 1, 3, 5, 15

DIRECTIONS: LIST THE SET OF MULTIPLES OF THESE NUMBERS4. M6 – 0, 6, 12, 18, 24, 30, 36, 42, 48, 54, 60….

5. M15 – 0, 15, 30, 45, 60, 75, 90, 105, 120, 135…

6. M14 – 0, 14, 28, 42, 56, 70, 84, 98, 112, 126…

DIRECTIONS: GIVE THE NEXT THREE NUMBERS IN EACH PATTERN

7. {0, 2, 4, 6, 8, 10, 12, 14} – the pattern is adding two each time (even numbers)

8. {0, 1, 4, 9, 16, 25, 36} – add the next odd number to the existing number

9. {1, 3, 6, 10, 15, 21, 28} – add the next number to existing number

DIRECTIONS: CIRCLE THE ANSWERS TO THE FOLLOWING QUESTIONS10. Which of these are prime numbers? 23, 3, 41, 59

11. Which of these are composite numbers? 9, 57, 34, 49

12. Which number is divisible by 5? 3,240

13. Which number is divisible by 3? 8,217

DIRECTIONS: WRITE THESE NUMBERS AS THE SUM OF TWO PRIME NUMBERS

14. 38: 31 + 7, 19 + 19

15. 52: 47 + 5, 41 + 11, 23+ 29

DIRECTIONS: GIVE THE PRIME FACTORIZATION OF THESE NUMBERS16. 18: 3 X 3 X 2

17. 30: 5 X 2 X 3

18. 42: 7 X 2 X 3

19. 16: 2 X 2 X 2 X 2

DIRECTIONS: FIND THE LEAST COMMON MULTIPLE OF EACH PAIR OF NUMBERS

20. LCM (8,10)

M8 – 0, 8, 16, 24, 32, 40, 48, 56…

M10 – 0, 10, 20, 30, 40, 50, 60…

21. LCM (9,12)

M9 – 0, 9, 18, 27, 36, 45, 54, 63, 72, 81…

M12 – 0, 12, 24, 36, 48, 60, 72…

22. LCM (5,15)

M5 – 0, 5, 10, 15, 20, 25, 30, 35, 40…

M15 – 0, 15, 30, 45, 60, 75…

DIRECTIONS: FIND THE GREATEST COMMON FACTOR OF EACH PAIR OF NUMBERS

23. GCF (9,18)

F9 – 1, 3, 9

F18 – 1, 2, 3, 6, 9, 18

24. GCF (12,25)

F12 – 1, 2, 3, 4, 6, 12

F25 – 1, 5, 25

25. GCF (18,30)

F18 – 1, 2, 3, 6, 9, 18

F30 – 1, 2, 3, 5, 6, 10, 15, 30