Verbal Reasoning - Mental Ability Questions

Which of the following will be the changed form of the word OBLIQUE when the word is written again by substituting each vowel by the second letter following it in the English alphabet and each consonant is substituted by the third letter following it in the English alphabet?

How many such letters are there in the word BREAK each of which is  as far away from the beginning in the word as when they are arranged alphabetically within them?

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

ILLUSTRIOUS

If the first and third letters in the word NECESSARY were interchanged, also the fourth and the sixth letters, and the seventh and the ninth letters, which of the follwing would be the seventh letter from the left ?

In the following question, select the missing number from the given series.

11, 13, 16, 18, 21, ?

In the following question, select the related letter pair from the given alternatives.

FMR : ELQ : : ?  :  ?

Choose the correct alternative that will continue the same pattern and replace 'x' in series 1,2,5,10,25,50,x,250