Just 6: 123 132 213 231 312 321
123 132 213 231 321 312 6 ways
It is 123.
126
Six. 321 312 231 213 123 132
It is impossible to work out 1233 + 3215. 1233 is not a valid base 3 number. Each digit in base 3 can only have a value 0, 1 or 2; it cannot have the value of 3 (the last digit of 123).
The greatest common factor of 123 and 321 is 3.
321
0112234-0112234-0112234-012-123-123-123-1234_4321-321-321-321-210-4332210-4332210-4332210
123 + 3 = 126
Just 6: 123 132 213 231 312 321
The answer is 347.
123 132 213 231 321 312 6 ways
123, 132, 213, 231, 312, 321
It is 123.
Adding 79 to 321 gives 400 as the result(79+321).
126