If 2 is added to each even digit and 1 is subtracted from each odd digit in the number 31264759, then what will be the sum of the second digit from the left and the third digit from the right in the new number thus formed?

Consider the numbers: 374, 659, 821, 945, 247. If the first and second digits of each number are interchanged, which of the following will become the third lowest number?

Consider the set of 3-digit numbers: 569, 987, 258, 753, 642. If the second digit of the smallest number is subtracted from the second digit of the largest number, what is the result?