Alphabet Test Questions

Select the term missing from the given series.

Y - 25, W - 23, U - 21, S - 19, ?

K, M, P, T, __

Select the letter missing from the given letter series.

Arrange the following words will come in middle if all of them are arranged alphabetically as in a dictionary?

From the word 'LAPAROSCOPY' how many independent meaningful words can be made without changing the order of the letters and using each letter only once ? 

If the sequence of the English alphabet is reversed then which letter is 7th to the left of second vowel from the right of English alphabet in the new series?

How many pairs of letters are there in the word 'HORIZON' which have as many letters between them in the word as in the English alphabet ?

How many letters are there in the word 'CREATIVE' which have as many letters between them in the word as in the alphabet ? 

How many meaningful  English words can be made from the letters EOPR using each letter only once?