Question

First three common multiples of 2 and 5 are-

(a) 2, 5, 10
(b) 5, 10, 15
(c) 10, 20, 30
(d) 10, 15, 30

Answer 1

First three common multiples of 2 and 5 are 10, 20, 30.

Answer 2

Solution:- 2 and 5 common multiple means

LCM of (2,5 )

2=2¹

5=5¹

LCM of(2,5)= 2¹× 5¹ =10

10 multiple =10,20,30

Hence:- option (c) 10 , 20 ,30 is right answer.