Find the greatest 4-digit number with all different digits.
Step by Step Explanation:
- As we know that there are ten different digits, i.e., 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9, where 9 is the greatest of all.
- We have to form the greatest 4-digit number without repeating the digits.
It means that we need to place the greatest digit at the thousands place, i.e., 9 and arrange the rest of the digits in the descending order, i.e., 9, 8, 7, and 6. .
- Hence, 9876 is the greatest 4-digit number with all different digits.
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