Question

find the greatest number of 5 digits exactly divisible by 2,4,6,8,and 10

Answer 1

LCM(Least Common Multiple) of 2,4,6,8, 10 is equal to 120.   Now, 99999 is the largest 5 digit number.   Dividing 99999 by 120, Remainder=39.   Subtract this remainder from the highest 5 digit number i.e.   99999-39=99960...

Answer 2

answer is 99960 (99999-120)