SSC CGL General Intelligence and Reasoning Topic Coding and Decoding — Detailed Notes

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Coding and Decoding is a fundamental topic in the SSC CGL Tier-I General Intelligence & Reasoning section. It tests your ability to decipher patterns and rules used to transform words, numbers, or symbols into coded forms. Typically, 2-4 questions appear from this topic, making it crucial for scoring well. The chapter covers various types: Letter Coding (shifting letters), Number Coding (assigning numbers to letters), Substitution Coding (replacing words with other words), Mixed Letter-Number Coding (combining letters and numbers), and Conditional Coding (rules based on conditions). You will also learn decoding techniques, common traps, and speed tips. To master this topic, practice identifying patterns quickly, verify rules with multiple examples, and avoid assumptions. Regular practice with previous year questions will build confidence and accuracy. This chapter provides a comprehensive guide, including solved examples and practice questions, to help you excel.

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