Find the least number which when doubled will be exactly divisible by 12, 16, 18, 21 and 28.

Correct option is D

Given:

The numbers are 12, 16, 18, 21, and 28.

Formula Used:

LCM(12, 16, 18, 21, 28)

LCM = 1008

Solution:

To find the least number which when doubled will be divisible by the LCM, we divide the LCM by 2.

The least number is: 1008 / 2 = 504