Question

Find the greatest 4-digit no. which is exactly divisible by each of 8,12 and 20 (with full solution)

Answer 1

LCM of 8,12 and 20 is 120.
Greatest 4- digit no.=9999
Divide 9999 by 120
Remainder =39
Req. no. = 9999-39
              =9960
Ans.=9960