Here repetition of digits allowed.
Fixing 9 for a thousand places we have
Fixing 6 for thousand places we have
Fixing 5 for thousands place
Fixing 3 for thousands place, we get
Thus we have 4 × 4 × 4 × 4 = 256 numbers.
(ii) The underlined 24 numbers were listed as the numbers with non-repeated digits. Remaining numbers are not listed in the previous list.