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DarknessW1thin

LCM for 15 and 20 is 60.

Here, let's use 20. Add it by 20 and you'll get 40. 15 is not a multiple of 40, so we add 20 to 40 again. 60 is a multiple of 15.

15 x 4

Hope this helped. =]

darintso

Answer: 60

Step-by-step explanation:

multiples of 20: 20, 40, 60, 80 100

multiples of 15: 15, 30, 45, 60, 75

which one is similar?

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good job