+273 What is the largest number, all of whose digits are 3 or 2, and whose digits add up to 11?
+539 To maximize the amount of digits, we should make as many digits as we can a 2. That would mean we get 4 2's since we need space for a three. Then we get one three. The largest number we can make with those digits is 32222.
+117 A three digit number whose digits add up to 9? ... The largest 3 digit number whose digits are all primes is 777. The largest 3 digit number with different prime digits is 753
