Question

Find the LCM of the following numbers by prime factorisation method.
ii. 15 and 25
iv. 18 and 27
v. 48, 56 and 72
vi. 26, 14 and 91.​

Answer 1

So let's start

Step-by-step explanation:

ii. 15 & 25

15 = 3× 5

25 = 5×5

= the LCM of 15 and 25 is 3×5×5 = 75

iv. 18 & 27

18= 2×3×3

27 = 3×3×3

= the LCM of 18 and 27 is 2×3×3×3 = 54

v. 48 & 56 & 72

48 = 2×2×2×2×3

56 = 2×2×2×7

72 = 2×2×2×3×3

= the LCM of 48, 56 and 72 is 2×2×2×2×3×3×7 = 1008

vi. 26 &14 & 91

26 = 2× 13

14 = 2×7

91 = 3×3×11

= the LCM of 26 , 14 and 91 is 2×7×13 = 182

Now finish

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