If the number $624739854$ is transformed such that 1 is added to all even digits and 1 is subtracted from all odd digits , then what is the sum of the...
Question
If the number $624739854$ is transformed such that 1 is added to all even digits and 1 is subtracted from all odd digits, then what is the sum of the digits which is fifth from the left end and fourth from the right end in the transformed number?