Letter Pair Sequence Puzzles
Letter pair sequence questions ask you to continue a pattern made from two-letter blocks. The key is to track the first letters and second letters separately, then combine the two next letters into one answer.
The Rules Every Letter Pair Sequence Question Uses
Each pair contains two separate alphabet sequences. Solve the top line by splitting every pair into a first letter stream and a second letter stream.
🔀 Rule 1: Split the pair into two sequences
The first letters may follow one rule while the second letters follow a different rule.
Example: BG, CI, DK, EM gives first letters B, C, D, E and second letters G, I, K, M.
➡️ Rule 2: Count alphabet shifts
Letters move forward or backward by a fixed number of places, such as +1, +3, -2, or -4.
Example: UK, SI, QG, OE moves both letters back 2 each time, so the next pair is MC.
↔️ Rule 3: Watch for alternating moves
A sequence may switch between two rules, such as forward 3 then back 2, repeated across the line.
Example: PL, SM, QN, TO uses +3, -2, +3 in the first letters and +1 each time in the second letters.
📈 Rule 4: Some jumps increase step by step
Instead of using one fixed move, the shifts can grow: +1, +2, +3, +4 or -1, -2, -3, -4.
Example: HQ, IP, JN, KK, LG has first letters moving +1 while second-letter jumps decrease by one more each time.
How to Solve Letter Pair Sequence Puzzles
Three useful moves: separate the two tracks, spot alternating rules, and beware of increasing jumps.
1. Track the first and second letters separately
Question: BG CI DK EM ( ________ )
Worked Method
The first letters are B, C, D, E. They move forward 1 letter each time, so the next first letter is F.
The second letters are G, I, K, M. They move forward 2 letters each time, so the next second letter is O.
Answer: FO. Tip: Write the first-letter line and the second-letter line separately if the pattern is not obvious.
2. Combine an alternating rule with a steady rule
Question: PL SM QN TO ( ________ )
Worked Method
The first letters are P, S, Q, T. They move forward 3, then back 2, then forward 3. The next move is back 2, so T becomes R.
The second letters are L, M, N, O. They move forward 1 letter each time, so the next second letter is P.
Answer: RP. Tip: Alternating rules often show up when a sequence seems to move in both directions.
3. Do not assume every jump is the same size
Question: HQ IP JN KK LG ( ________ )
Worked Method
The first letters are H, I, J, K, L. They move forward 1 letter each time, so the next first letter is M.
The second letters are Q, P, N, K, G. The moves are -1, -2, -3, -4, so the next move is -5. G back 5 is B.
Answer: MB. Tip: If a fixed jump fails, check whether the jump size is growing or shrinking each step.
Before You Buy
Want to check the level and layout first? Download the free 3-question sample. It uses the same question style, printable format, and answer-key approach as the full pack.
Download Free Sample PDFGet the Full Practice Pack
The full pack includes 90 letter pair sequence questions across 3 test sets. Each answer key gives the final pair and explains the separate rule for each letter position.
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