Question

EXERCISE
2E
nd
1. Find the LCM of the following by prime factorisation
(i) 25 and 80​

Answer 1

Answer:

lcm (25; 80) = 24 × 52;

lcm (25; 80) = 24 × 52 = 400

the numbers have common prime factors.

Answer 2

Answer:

25and 80

2 25,80

2 25,40

2 25,20

2 25,10

5 25,5

5 5, 1

1 , 1

LCM of 2×2×2×2×5×5=400