यदि संख्या 7145632 में प्रत्येक विषम अंक में 2 जोड़ा जाता है और प्रत्येक सम अंक से 1 घटाया जाता है, तो इस प्रकार बनी नई संख्या में कितने अंक एक से अधिक बार दिखाई देंगे?

If 1 is added to each odd digit and 2 is subtracted from each even digit in the number 7531468, how many digits will appear more than once in the new number thus formed?

If 1 is added to each odd digit and 2 is subtracted from each even digit in the number 5431786, what will be the difference between the highest and lowest digits in the new number thus formed?