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Basic Math skills

Basic Math skills. Chapter 2 Practice Test Mastery Test A. Directions: list the set of all factors of these numbers. F 20 – 1, 2, 4, 5, 10, 20 F 24 – 1, 2, 3, 4, 6, 8, 12, 24 F 15 – 1, 3, 5, 15 DIRECTIONS: LIST THE SET OF MULTIPLES OF THESE NUMBERS

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Basic Math skills

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  1. Basic Math skills Chapter 2 Practice Test Mastery Test A

  2. Directions: list the set of all factors of these numbers • F20 – 1, 2, 4, 5, 10, 20 • F24 – 1, 2, 3, 4, 6, 8, 12, 24 • F15 – 1, 3, 5, 15 DIRECTIONS: LIST THE SET OF MULTIPLES OF THESE NUMBERS • M6 – 0, 6, 12, 18, 24, 30, 36, 42, 48, 54, 60…. • M15 – 0, 15, 30, 45, 60, 75, 90, 105, 120, 135… • M14 – 0, 14, 28, 42, 56, 70, 84, 98, 112, 126…

  3. Directions: give the next three numbers in each pattern • {0, 2, 4, 6, 8, 10, 12, 14} – the pattern is adding two each time (even numbers) • {0, 1, 4, 9, 16, 25, 36} – add the next odd number to the existing number • {1, 3, 6, 10, 15, 21, 28} – add the next number to existing number DIRECTIONS: CIRCLE THE ANSWERS TO THE FOLLOWING QUESTIONS • Which of these are prime numbers? 23, 3, 41, 59 • Which of these are composite numbers? 9, 57, 34, 49 • Which number is divisible by 5? 3,240 • Which number is divisible by 3? 8,217

  4. Directions: write these numbers as the sum of two prime numbers • 38: 31 + 7, 19 + 19 • 52: 47 + 5, 41 + 11, 23+ 29 DIRECTIONS: GIVE THE PRIME FACTORIZATION OF THESE NUMBERS • 18: 3 X 3 X 2 • 30: 5 X 2 X 3 • 42: 7 X 2 X 3 • 16: 2 X 2 X 2 X 2

  5. DIRECTIONS: FIND THE LEAST COMMON MULTIPLE OF EACH PAIR OF NUMBERS • LCM (8,10) M8 – 0, 8, 16, 24, 32, 40, 48, 56… M10 – 0, 10, 20, 30, 40, 50, 60… • LCM (9,12) M9 – 0, 9, 18, 27, 36, 45, 54, 63, 72, 81… M12 – 0, 12, 24, 36, 48, 60, 72… • LCM (5,15) M5 – 0, 5, 10, 15, 20, 25, 30, 35, 40… M15 – 0, 15, 30, 45, 60, 75…

  6. Directions: find the greatest common factor of each pair of numbers • GCF (9,18) F9 – 1, 3, 9 F18 – 1, 2, 3, 6, 9, 18 • GCF (12,25) F12 – 1, 2, 3, 4, 6, 12 F25 – 1, 5, 25 • GCF (18,30) F18 – 1, 2, 3, 6, 9, 18 F30 – 1, 2, 3, 5, 6, 10, 15, 30

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