Number Coding
A=1 to Z=26; digits spell words; simple position sums.
Number Coding
Number Coding
What you'll learn
- A=1, B=2, … Z=26 letter position code.
- Digits can spell words in puzzles.
- Simple position sums (CAT = 3+1+20 = 24).
- Use alphabet-number line in exam.
Key concepts
Level 1 — Core idea
Verbal: A is first letter → 1; B → 2.
Symbolic: D = 4, O = 15, G = 7 → DOG sum = 26 (intro).
Visual: Table A–Z with numbers 1–26 underneath.
Level 2 — Going deeper
Reverse: 26 may be Z. Some puzzles code word as concatenation (1-12-5 for ALE) — read question style.
NCERT anchor
NCERT Math Mela number puzzles and English alphabet together build this skill.
Worked example
Find number for B and D.
Step 1 — A=1 → B=**2**, D=**4**
Answer: B=2, D=4 ✓
Position sum of BAD (intro).
Step 1 — B=2, A=1, D=4
Step 2 — Sum = 2+1+4 = **7**
Answer: **7**
Common mistakes
| Mistake | Why | Fix |
|---|---|---|
| A=0 start | Zero-index habit | Class 3: A=1 |
| Forget Z=26 | End of alphabet | Count or memorise Z |
| Sum vs concatenate | 12 vs 3 for AB | Read if add or join digits |
| Skip double-digit letters | K=11 error | Use chart |
Quick check
- Number for M?
- A=1 — what is C?
- Sum of A + B?
- Stretch: Which letter is 26?
Revision tip: Memorise A=1, E=5, J=10, O=15, T=20, Z=26 anchors.
Open the Practice tab for graded questions on Number Coding.
Key Takeaways (TL;DR)
- What you'll learn
- Key concepts
- Worked example
- Common mistakes
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