1324
9,999,876 is the greatest seven-digit number using four different digits.
987654
The greatest 5-digit number using 3 different digits is 99987. This number is formed by using the digit '9' three times, along with '8' and '7' to maximize the overall value while adhering to the condition of using only three different digits. Other combinations, like 99876 or 99875, do not yield a higher number while still using only three distinct digits.
The greatest 9-digit number using three different digits is 999888777, formed by using the digits 9, 8, and 7 in descending order. The smallest 9-digit number using three different digits is 100000000, created with the digits 1, 0, and 0. This arrangement ensures that the number starts with 1, followed by the zeros to maintain the smallest value.
99874To solve this type of problems, you go from left to right, using the largest possible digit in every case.
9,999,876 is the greatest seven-digit number using four different digits.
987654
The greatest 5-digit number using 3 different digits is 99987. This number is formed by using the digit '9' three times, along with '8' and '7' to maximize the overall value while adhering to the condition of using only three different digits. Other combinations, like 99876 or 99875, do not yield a higher number while still using only three distinct digits.
The greatest 9-digit number using three different digits is 999888777, formed by using the digits 9, 8, and 7 in descending order. The smallest 9-digit number using three different digits is 100000000, created with the digits 1, 0, and 0. This arrangement ensures that the number starts with 1, followed by the zeros to maintain the smallest value.
99874To solve this type of problems, you go from left to right, using the largest possible digit in every case.
To be an even number then the final digit = 2. The largest single prime digit is 7 (as both 8 and 9 are composite). The greatest even number fulfilling the conditions is 77777772.
The greatest possible number that a 5-digit combination can form is 99999. This is achieved by using the highest digit, 9, in each of the five places. Therefore, the largest 5-digit number is 99999.
7,543
97531
Proceed from left to right, using the largest possible digit in each position.
1080, 9989
The greatest 5 digit number is 98765. The greatest 5 digit number that doesn't contain any of those digits is 43210. The difference between them is 55555.The two five digit numbers using all ten digits once and only once between them that sum to the largest value are 97531 and 86420. They sum to 183,951 and have a difference of 11111. These two numbers are not unique ... you can switch any pair of digits between the two numbers as long as you keep them in the same position without changing the sum, though this will change the difference.