Letter series — Logical reasoning for kids

How to think it through

Letters are numbers — “change each letter to its place in the alphabet and find the jump”

1. Write the position of each letter: A = 1, B = 2 … (remember E = 5, J = 10, O = 15, T = 20, Y = 25).
2. Find the jump between the positions — forwards, backwards or growing.
3. Take one more jump and turn the number back into a letter. For pairs like AB, CD, EF, treat each letter of the pair as its own series.

Use it for: Alphabet series in reasoning tests, coding–decoding, and dictionary order.

Worked example: What comes next? B, E, H, K, N, ? Q

✏️ Practice

Work it out in your head or on paper, type the answer and press Check. Stuck? Press “Show me how”.

🏁 Lesson 2 test

20 questions. Check each answer, then go to the next one. Get 16 or more right to pass.

🏅 Sign in with Google to earn the 🔤 Letter Leaper badge when you pass — and a certificate when you finish all 10 lessons of Part 1 · Patterns. You can still take the test without signing in.

🖨️ Letter Series Worksheet

• Worksheet set 1 (PDF)
• Worksheet set 2 (PDF)
• Worksheet set 3 (PDF)