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.
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
The letter that does not belong in the series H D R YL is "R." The other letters can be seen as initials of colors: H for Hue, D for Dark, Y for Yellow, and L for Light. R does not fit into this color categorization, making it the odd one out.
The next group of letters in the series is "on." The pattern involves skipping one letter between each pair: b (skip c) d, e (skip f) g, h (skip i) j, k (skip l) m. Following this pattern, after "k" and "m," the next letters are "o" (skip n) and "n."
If the series is plus one, times two, plus one, times two, etc., the 8 does not belong.