Lcm And Hcf

Step 1: Find the Least Common Multiple (LCM).
We need to find the least number which leaves a remainder of 1 when divided by 7, 12, and 15. The required number is of the form . The LCM of 7, 12, and 15 is calculated as:

Step 2: Add 1 to the LCM.
Therefore, the required number is:

Final Answer: