arithmetic - numbers greater than 1000 but not greater than 4000 which can be formed with the digits 0 1 2 3 4 repetition of digits is allowed are - skillgun

Numbers greater than 1000 and less than or equal to 4000 will be of 4 digits and will have either 1 (except 1000) or 2 or 3 in the first place with 0 in each of remaining places.
After fixing 1st place, the second place can be filled by any of the 5 numbers. Similarly third place can be filled up in 5 ways and 4th place can be filled up in 5 ways. Thus there will be ways in which 1 will be in first place but this include 1000 also hence there will be 124 numbers having 1 in the first pl