Find the greatest 4-digit number exactly divisible by 3, 4 and 5?
Q1. Find the greatest 4-digit number exactly divisible by 3, 4 and 5?
Answer: 9960
Explanation: LCM(3,4,5) = 60; the greatest 4-digit multiple of 60 is 9960 (since 9999÷60 = 166.65, so 166×60 = 9960).