Find the LCM of the following numbers: (a) 30, 72 ; (b) 36, 54: Class 7
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Find the LCM of the following numbers: (a) 30, 72 ; (b) 36, 54: Class 7
Question 1.
Find the LCM of the following numbers: Class 7
(a) 30, 72
Solution:
30 = 2 × 3 × 5
72 = 2 × 2 × 2 × 3 × 3
LCM = 2 × 3 × 2 × 2 × 3 × 5 = 360.
(b) 36, 54
Solution:
36 = 2 × 2 × 3 × 3
54 = 2 × 3 × 3 × 3
LCM = 2 × 3 × 3 × 2 × 3 = 108.
(c) 105, 195, 65
Solution:
105 = 3 × 5 × 7
195 = 3 × 5 × 13
65 = 5 × 13
LCM = 5 × 3 × 7 × 13 = 1365
(d) 222, 370
Solution:
222 = 2 × 3 × 37
370 = 2 × 5 × 37
LCM = 2 × 37 × 5 × 3 = 1110.