If 2 is added to each odd digit and 1 is subtracted from each even digit in the number 62478324, then what will be the difference between the highest and the lowest digits in the 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?