The difference between the greatest and the smallest 4 digit numbers that can be formed by the digits 5, 3, 0 and 8 such that 5 is always at ones place and number digits are repeated is
5220
Greatest number = 8530
Since 5 should be in onesplace = 8305
And smallest number = 3085
∴Difference=8/32/0105 3085––––– 5220–––––