What should come in the place of question mark (?) in the fol- ; lowing series based on the above , arrangement ? MRJ ©F9 *E2 ? 

How many such numbers are there in the above arrangement, each of which is immediately preceded by a letter but not immediately followed by a letter ?

If all the symbols and all the |' vowels are dropped from the above arrangement, which of the following will be twelfth from the , right end ?

How many such consonants are there in the above arrangement, each of which is immediately preceded by a symbol and immedi-i ately followed by a number ?

Which of the following is the sixth to the left of the twentieth from the left end of the above arrangement?

Among P, Q, R, S and T each having a different height, Q is shorter than only T and S is shorter than P and R. Who among them is the shortest ?