1) LCM means a) least common multiple b) lowest common more c) lower count multiple 2) What is the LCM of 5 and 15? a) 5 b) 15 c) 30 d) 45 3) The LCM of 8 and 10 is 80 a) True b) False 4) What is the LCM of 5 and 6? a) 5 b) 6 c) 20 d) 30 e) 45 5) The LCM of 3 and 7 is 42 a) Yes b) No 6) What is the LCM of 4 and 9? a) 4 b) 9 c) 18 d) 32 e) 36 7) The LCM of 7 and 12 is 28 a) True b) False 8) What is the LCM of 2 and 6? a) 4 b) 12 c) 14 d) 20 e) 6 9) What is the LCM of 4 and 10? a) 40 b) 20 c) 10 d) 12 e) 4 10) What is the LCM of 7 and 5? a) 15 b) 21 c) 70 d) 35 e) 20 11) LCM of 8 & 10 a) 80 b) 10 c) 40 d) 16 12) These are ways to find the LCM, using a) factor trees, division ladders, or a factors list b) Factor trees, division ladders, or a multiples list c) Factor trees, division ladders, or counting by ones 13) LCM of 4, 16, and 32 a) 4 b) 32 c) 16 d) 64 14) When you want to find the LCM, just multiply the numbers and that gives you the answer. a) True b) False 15) Skip counting is one way to find the LCM a) True b) False 16) To find the LCM, follow the steps for GCF, then... a) it's the same as the GCF. b) write down all remaining prime numbers twice. c) include composite numbers. d) include remaining prime numbers in the multiplication sentence. 17) Three friends, Anna, Ben, and Chloe, are running laps around a track. Anna takes 6 minutes to run one lap, Ben takes 8 minutes, and Chloe takes 10 minutes. If all three start running from the same point at the same time, how many minutes will it take for them all to meet at the starting point again? a) 120 minutes b) 6 minutes c) 24 minutes d) 30 minutes

LCM Practice

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