9
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.
4! = 24 ■
3024
how make the answer im don/now
3*3*2*1 = 18 of them.
It is already a four-digit number.
9
A digit is that which we used to count numbers.
With 123 digits you can make 123 one-digit numbers.
24 = 16 1111 1112, 1121, 1211, 2111 1122,1212,2112,2121,1221,2211 1222,2122,2212,2221 2222
what is the greatest 4-digit number you can make with the digit 0,1,2,3, and 4
Ten different digits can be used to make 10C4 = 10*9*8*7/(4*3*2*1) = 210 four-digit numbers. Either numbers starting with 0 are permitted or the 10 digits do not contain a 0.