Question

Find the smallest number of 6 digits which on being diminished by 7 is exactly divisibal by 15,20,30,40,50 and 60

Answer 1

LCM is 600 divide 100000 by 600 then the remainder is 400 then subtract 400 from 600 then add 200 with 100000 then it is 100200 then add 7 with it then the answer is 100207