Question 1
In a row of 44 people, A is 13th from the left. After interchanging positions with B, A becomes 21th from the left. B originally was 16th from the right. What is A's new rank from the right?
After interchange, A's new left rank is 21. So A's new right rank = total - new_left + 1 = 44 - 21 + 1 = 24.