If 2 is added to each even digit and 2 is added to each odd digit in the number 6345127, what will be the sum of the last two and first two digits in the new number thus formed?

If all digits within each number are arranged in descending order, which of the following results in the largest number? 965 425 257 354 284

This question is based on the five, three-digit numbers given below. (Left) 847 429 517 371 386 (Right) (Example: 697 - First digit = 6, second digit = 9 and third digit = 7) What will be the resultant if the second digit of the highest number is multiplied with the second digit of the lowest number?