-9
The largest 3 digit number whose digits are all primes is 777. The largest 3 digit number with different prime digits is 753.
Find a four digit number whose digits will be reversed when multiplied by nine?
The largest three digit prime number whose digits are all primes is 773.
It is 0.88887
.77775
Nine hundred thirty (930) is the highest three digit number whose digits have a sum of 12. 9+3+0=12. Any numbers higher than that will give you an sum greater than 12.
1
It is 5 whose place value represents 500
It is: 999 => 9+9+9 = 27 => 2+7 => 9
930
279,999,720
992