K - The pattern is to skip one letter of the alphabet in between each - between D and F there would usually be a "D", between F and H a "G" and so on.
k
A
N, because it is not in the first half of the alphabet.
The answer is KThe letter should be L
30
You could make a case for any of them.
8
9 - all the rest are prime
All the words' letters are in alphabetical order except PRISM.
Most probably 48.
133 ,because all haveroot squares except 133
If the series is plus one, times two, plus one, times two, etc., the 8 does not belong.
The letters 'ustoodwernj' = justone word.
You have to find a pattern in the numbers, and exclude the one that messes up the pattern.