24
256
9,999,876 is the greatest seven-digit number using four different digits.
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.
The greatest 4-digit number with no repeated digits is... 9876
18 (and 6 more starting with a 0).
how make the answer im don/now
256
9,999,876 is the greatest seven-digit number using four different digits.
1
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.
The greatest 4-digit number with no repeated digits is... 9876
18 (and 6 more starting with a 0).
9876 is the largest four digit number you can make if all the digits must be different.
To form a four-digit number using the digits 1, 2, 3, 4, 6, and 7 without repeating any digit, we can choose 4 digits out of the 6 available. The number of ways to choose 4 digits from 6 is given by the combination formula ( \binom{6}{4} ), which equals 15. Each selection of 4 digits can be arranged in ( 4! ) (24) different ways. Thus, the total number of four-digit numbers that can be formed is ( 15 \times 24 = 360 ).
Find a four digit number whose digits will be reversed when multiplied by nine?
There is no such number. If the four digits are even, the entire number is even, not odd.
The largest four-digit odd number that can be formed using the digits 1-9 is 9871. This number uses the highest available digits while ensuring the last digit is odd, which is necessary for the number to be classified as odd.