2233
2323
2332
3232
3223
3322
The four-digit numbers that can be formed using the digits 6, 7, 8, and 9, without repetition, are all the permutations of these four digits. There are 24 possible combinations, including numbers like 6789, 6798, 6879, and so on. Essentially, any arrangement of these four digits constitutes a valid four-digit number.
Total possible 4-digit numbers= 1000, 1001,...,9999 = 9000 Total with same digit numbers = 1111,2222,...,9999 = 9 9000 - 9 = 8991
1047, 1407, 4017, 4071 are four (out of eight) such numbers.
3024
Four digit numbers span from 1000 to 9999. This totals (9999-1000) +1 = 9000 different four digit numbers
Total possible 4-digit numbers= 1000, 1001,...,9999 = 9000 Total with same digit numbers = 1111,2222,...,9999 = 9 9000 - 9 = 8991
1047, 1407, 4017, 4071 are four (out of eight) such numbers.
2222
1
A four digit whole number can be found from 1000 to 9999
Lowest four-digit number: 1000 Highest four-digit number: 9999
3024
Four digit numbers span from 1000 to 9999. This totals (9999-1000) +1 = 9000 different four digit numbers
7000 - 999 ie 6001 four digit numbers
1
3*3*2*1 = 18 of them.
9