1) LCM (Least Common Multiple) The smallest positive number that is a multiple of two or more numbers. a) True b) False 2) What is the least common multiple of 5 and 6? a) 5 b) 20 c) 45 d) 6 e) 30 3) Is the LCM of 3 and 7, 42? a) True b) False 4) What is the LCM of 4 and 9? a) 4 b) 9 c) 18 d) 32 e) 36 5) What is the LCM of 6 and 12? a) 12 b) 18 c) 20 d) 10 e) 11 6) GCF (Greatest Common Factor) The highest number that divides exactly into two or more numbers. It is the "greatest" thing for simplifying fractions! a) True b) False 7) What is the GCF of 24 and 21? a) 3 b) 4 c) 6 d) 2 e) 5 8) What is the GCF of 80 and 60? a) 3 b) 10 c) 5 d) 8 e) 6 9) Is the GCF of 56 and 72, 8? a) True b) False

LCM and GCF Study Problems

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