Number, Ranking and Time Sequence Test Questions

Nitin ranks 23rd from the top in a class of 42. What will be his rank from the last?

X's rank was 12 from the to. If the total number of students in the class was 16, then X's rank from the bottom of the class is

If each term in the given sequence is assigned number 1, 2, 3... according to their position from the left, then the sum of the numerical values of the positions of the symbols will be ____.

R+JM2$#QR?*O@7F3

Rearrange the jumbled letters to make a meaningful word and then select the one which is different.