Question

What will be the least number which when doubles will be exactly divisible by 12, 18, 21 & 30?

Answer 1

Answer:

630

Step-by-step explanation:

Let the number be x.

so,

2(x) is easily divisible by 12, 18, 21 and 30.

hence, 2x will be the LCM of 12, 18, 21 and 30.(least no.)

LCM of 12, 18, 21 and 30 = 1260

as, 2x=1260

x=630

hence, the least number which when doubled will be exactly divisible by 12, 18, 21 and 30 is 630