RS Aggarwal Vikash Aggarwal Class 5 Activity Book Composite Mathematics Activity Sheet 37 Solution
Activity Sheet-37
Find L.C.M. by prime factorization method:
(1) 60 = 2 × 2 × 3 × 5
Contents
75 = 3 × 5 × 5
∴ L. C. M = 2 × 2 × 3 × 5 × 5 = 300.
(2) 42 = 2 × 3 × 7
48 = 2 × 2 × 2 × 2 × 3
∴ L. C. M = 2 × 3 × 7 × 2 × 2 × 2 = 336.
(3) 30 = 2 × 3 × 5
36 = 2 × 2 × 3 × 3
48 = 2 × 2 × 2 × 2 × 3
∴ L. C. M = 2 × 3 × 5 × 2 × 3 × 2 × 2 = 720.
(4) 28 = 2 × 2 × 7
42 = 2 × 3 × 7
80 = 2 × 2 × 2 × 2 × 5
∴ L. C. M = 2 × 2 × 7 × 3 × 2 × 2 × 5 = 1680.
(5) 20 = 2 × 2 × 5
25 = 5 × 5
30 = 2 × 3 × 5
45 = 3 × 3 × 5
∴ L. C. M = 2 × 3 × 5 × 2 × 5 × 3 = 900.
(6) 60 = 2 × 2 × 3 × 5
72 = 2 × 2 × 2 × 3 × 3
85 = 5 × 17
96 = 2 × 2 × 2 × 2 × 2 × 3
∴ L. C. M = 2 × 2 × 2 × 3 × 5 × 3 × 17 × 2 × 2 = 24480.