QAR, RAS, SAT, TAU, ? 

_bdd_ _d_ _ebd_e_dd

Directions: In each of the following questions, find out how many such pairs of letters are there in the given word each of which has as many letters between them in the word as in the English alphabet.
NECESSARY 

In each of the following question , find the missing letters from the given response.
HIIJ, IJJK, JKKL,  KLLM,  LMMN, ?

Directions: Study the following information carefully and answer the questions given beside:

 4 3 6 3 4 5 9 2 8 7 2 3 6 5 2 7 3 9 1 2 1 8 4 9 8 1 2 4 7 7 5 2

Which element is exactly midway between the sixteenth element from the left end and eleventh from the right end?

From the given alternative words, select the one which cannot be formed using the letters of the given word.
TAMBOURINE