9876 is the largest four digit number you can make if all the digits must be different.
The largest 3 digit number whose digits are all primes is 777. The largest 3 digit number with different prime digits is 753.
9876543
The largest ten digit number with no repeated digits is '9876543210'.
9876 (:
The largest ten digit number with no repeated digits is '9876543210'.
9,876
9999876
The largest number with no repeated digits is 9,876,543,210 although it is 10 digits long, the largest 3 digit number with no repeated digits is 987
> 9999876 Actually, 9999876 has four different digits (6, 7, 8, 9). The largest 7-digit number with three different digits is 9999987.
The largest 10-digit number with no digit repeated is 9876543210 !
You get the largest number if you sort the digits, from largest to smallest.