Correct Answer:
Option A - When a six-digit number is formed by repeating a 3-digit number, like ABC is written ABC ABC then it is always divisible by 7, 11, 13 and LCM of 7, 11, 13 is 1001.
A. When a six-digit number is formed by repeating a 3-digit number, like ABC is written ABC ABC then it is always divisible by 7, 11, 13 and LCM of 7, 11, 13 is 1001.