Letter Series Practice
Letter Series Free Practice Test
Start with the free letter-series practice test. It shows you your current level and which patterns still slow you down.
Assessment Practice pack
Parts of the letter series practice pack
Letter Series explanation
In a letter series question you get a row of letters that follows a fixed pattern; you work out which letter belongs where the question mark is. Nearly all questions come down to a few patterns:
- Fixed step — the same jump every time, for example B – D – F – H (two letters ahead each time).
- Growing step — the jump gets bigger, for example A – B – D – G (step 1, 2, 3).
- Alternating — two interleaved series, for example A – Z – B – Y – C – X: forwards and backwards at once.
- Backwards and around — down the alphabet, and after A you continue at Z (the series wraps around).
Tip: write out the alphabet with positions on your scratch paper (A=1, B=2 … Z=26). The differences between positions turn every pattern into a simple row of numbers.
Worked example
C – F – I – L – ?
A. M B. N C. O D. P
Answer C is correct: the positions are 3, 6, 9, 12 — three ahead each time. The next letter sits at position 15, which is O.
Letter Series assessments
Next, train with the practice sets below. After each set you see your score and, for every question, the pattern behind it.
Letter Series Evaluation of your results
Finish with the easy and difficult selections: easy to build confidence, difficult to prepare for the hardest series in the assessment.
Assessment Practice pack