Question

find the LCM of the following numbers by writing multiples. 1) 2,4,5 2) 12,20 3) 18,27

Answer 1

Hey!
Your answer is here
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1)LCM of 2,4,5
2= 2,4,6,8,10,12,14,16,18,20,22,24,28,30,32
4=4,8,12,16,20,24,28,32,36,40,44,48,52,56
5=5,10,15,20,25,30,35,40,45,50,55,60,65

So,the LCM is 20.
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2)LCM of 12 and 20
12=12,24,36,48,60,72,84,96,108,120
20=20,40,60,80,100,120,140,160,180,200

So, the LCM is 60.
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3) LCM of 18 and 27.
18= 18,36,5472,90,108,126,144,162,180
27= 27,54,81,108,135,162,189,216,243

So, the LCM is 54.
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Answer 2

(1) 2= 2,4,6,8,10,12,14,16,18,20,22
4=4,8,12,16,20,24,28,32,36,40
5=5,10,15,20,25,30,35,40,45,50

so the LCM of 2,4 and 5 is 20

(2) 12= 12,24,36,48,60,72,84,96,108,120
20= 20,40,60,80,100,120
so the LCM of 12 and 20 is 120

(3) 18= 18,36,54,72,90,108,126,144,162
27= 27,54,81,108
so the LCM of 18 and 27 is 54