what is the largest 4-digit number you can make
9876 is the largest four digit number you can make if all the digits must be different.
For this type of "the largest number which..." questions, you need to advance from left to right, using the largest possible digit in each case. For the first two digits, that would be 9, for the third digit (the right-most digit), the largest digit which will make this possible is an 8.
348+301 can make 649
The largest 5 all odd digit number is 99999, which makes the rest of the question meaningless. 59713 if you think the information is not meaningless
There is no such number. If there was one, simply add another digit at the end and you will have a larger number.
That depends a lot on how often you may repeat each digit, and what operations are allowed. If you just want to write a four-digit number, using each digit once, start by writing the largest digit on the left, then continue with the second-largest, etc.
The number is 9875.
999next number is 1,000
99 is odd and if you added one more it would be 3 digit.
97632 is the largest number containing these digits. To make the largest number simply order the numbers in descending order. As it happens this results in an even number so nothing further is necessary.