If 1 is subtracted from each odd digit and 2 is subtracted from each even digit in the number 356755437564, what will be the sum of the digits which are third from the left and second from the right in the new number thus formed?

Refer to the following letter, number, and symbol series and answer the question that follows. Counting is to be done from left to right only. (Left) Z £ & O O 3 P @ P F P 3 © 4 & H 8 & @ * F £ (Right) If all the numbers are dropped from the series, which of the following will be sixth from the left?

If 2 is added to each odd digit and 1 is added to each even digit in the number 12684573, how many digits will appear more than once in the new number thus formed?