Question

LCM of
1.)20, 15,2,3
2.) 4, 10, 56
3.) 9, 18, 16, 23

Answer 1

Answer:

1.) The LCM of 20, 15, 2 and 3 is 60

20 = 2 × 2 × 5

15 = 3 × 5

2 = 2

3 = 3  

LCM(20, 15, 2, 3)

= 2 × 2 × 3 × 5

= 60

2.) The LCM of 4, 10, and 56 is 280

4 = 2 × 2

10 = 2 × 5

56 = 2 × 2 × 2 × 7  

LCM(4, 10, 56)

= 2 × 2 × 2 × 5 × 7

= 280

3.) The LCM of  9, 18, 16, and 23 is 3312

9 = 3 × 3

18 = 2 × 3 × 3

16 = 2 × 2 × 2 × 2

23 = 23  

LCM(9, 18, 16, 23)

= 2 × 2 × 2 × 2 × 3 × 3 × 23

= 3312

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Answer 2

Answer:

1)20=2×2×5

15=3×5

2=2

3=3

lcm=2×2×3×5=60

2)4=2×2

10=5×2

56=2×2×2×7

lcm=2×2×2×5×7=280

3)9=3×3

18=2×3×3

16=2×2×2

23 =23

lcm=3×3×2×2×2×23=1656