Understand the rule first
Write alphabet positions and differences. If one step does not repeat, split odd and even terms or test an alternating pattern, remembering that sequences may wrap after Z.
Track constant, alternating and interleaved movements through the alphabet.
Write alphabet positions and differences. If one step does not repeat, split odd and even terms or test an alternating pattern, remembering that sequences may wrap after Z.
Continuing only the most recent jump without checking the whole sequence.
Reusable method: Write the alphabet positions under the sequence.Every term advances four positions.
Answer A: T
P is position 16; add 4 to reach T at position 20.
Quick method: Write the alphabet positions under the sequence.
Separate odd and even positions.
Answer B: I
Odd terms B, D, F rise by 2; even terms E, G, I also rise by 2.
Quick method: Write the alphabet positions under the sequence.
Each term moves back three letters.
Answer C: M
P moved back three letters is M.
Quick method: Write the alphabet positions under the sequence.
The changes alternate +4, −1.
Answer D: M
C + 4 = G, −1 = F, +4 = J, −1 = I, then +4 = M.
Quick method: Write the alphabet positions under the sequence.
Advance five letters each time and wrap after Z.
Answer A: Q
W + 5 wraps to B, then G, L and Q.
Quick method: Write the alphabet positions under the sequence.
Move forward three letters each time.
Answer D: O
C → F → I → L advances by three positions, so the next letter is O.
Quick method: Write the alphabet positions under the sequence.
Move backwards three letters each time.
Answer A: N
Z → W → T → Q moves back three positions, so the next letter is N.
Quick method: Write the alphabet positions under the sequence.
The jumps increase by one each time.
Answer B: U
The jumps are +2, +3, +4 and +5. The next jump is +6: O → U.
Quick method: Write the alphabet positions under the sequence.
Separate the letters in odd and even positions.
Answer C: H
Odd-position letters are B, D, F, H; even-position letters are E, G, I. The next letter is H.
Quick method: Write the alphabet positions under the sequence.
The positions are 1, 4, 9, 16, 25 and 36; wrap 36 after 26.
Answer D: J
36 − 26 = 10, and the tenth letter is J.
Quick method: Write the alphabet positions under the sequence.