Award articleBecause of it's number has 10 digits are different so we have to use all the digits from 0 to 9We have: Digit a cannot be less than the digit next to it deduce it must be greater than or equal to that of digitsBecause some of them are created by the various Wolf should be a numeral could not by 2-digit additionIf a digit is greater than the 2 of them so I have bc. Suppose that of digits d left side digit b such that b and d ...
đang được dịch, vui lòng đợi..