Number, Ranking and Time Sequence Test Questions

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

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

If the first 10 terms and the last 10 terms of the given expression are interchanged in such a way that the first term is interchanged with the last, the second with the second last, the third with the third last and soon, what will the fifth term from the right be in the new arrangement?

RB75E%M3W48Q9#B2A$MS

How many 6's are there in the following sequence that are immediately preceeded by 3 but not immediately followed by 0?

3 6 9 0 6 9 3 6 9 3 6 6 3 6 0 6 3 3 6 0