यदि संख्या '847239671' में 5 से बड़े सभी अंकों में से 3 घटाया जाता है और 5 से छोटे सभी अंकों में 2 जोड़ा जाता है, तो नवगठित संख्या में कितने अंक दोहराए जाते हैं?

Each of the digits in the number 2743956 is arranged in ascending order from left to right. What will be the sum of the digits which are second from the left and second from the right in the new number thus formed?

If 1 is added to each odd digit and 1 is subtracted from each even digit in the number 3215674, which of the following digits will be first from the right?