A4. Coding–Decoding / कूटलेखन

Topic Overview / विषय परिचय

This chapter is high-scoring in SSC GD and often appears in short questions.
Goal: identify the pattern quickly and avoid overthinking.
Practice with timer: 30–40 seconds per question.

Important Rules / Formulae / महत्वपूर्ण नियम

• Common rules: +1/+2 shifting, reverse, A1Z26 numbering, swapping positions.
• Always validate rule on 2 letters (first & last) before solving.
• Write alphabet positions quickly: A1 B2 C3 ...