Coding-Decoding and Symbol Logic
25 UPSC CSE (Prelims) Logical Reasoning and Analytical Ability previous year questions (PYQs) from 10 papers, 2017 to 2026, with answers and worked solutions.
About this chapter
- Difficulty: 7 easy · 16 moderate · 2 hard.
- Most-asked subtopics: Letter and Number Coding (15), Symbol and Inequality Coding (10).
- Updated 29 August 2026.
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#1EasyLetter and Number Coding
#2ModerateLetter and Number Coding
#3EasyLetter and Number Coding
#4EasySymbol and Inequality Coding
#5ModerateLetter and Number Coding
#6ModerateSymbol and Inequality Coding
#7ModerateSymbol and Inequality Coding
#8EasyLetter and Number Coding
#9ModerateLetter and Number Coding
#10ModerateSymbol and Inequality Coding
#11HardSymbol and Inequality Coding
#12ModerateLetter and Number Coding
#13EasyLetter and Number Coding
#14ModerateLetter and Number Coding
#15ModerateLetter and Number Coding
#16ModerateLetter and Number Coding
#17ModerateSymbol and Inequality Coding
#18EasyLetter and Number Coding
#19HardSymbol and Inequality Coding
#20ModerateSymbol and Inequality Coding
#21ModerateSymbol and Inequality Coding
#22EasySymbol and Inequality Coding
#23ModerateLetter and Number Coding
#24ModerateLetter and Number Coding
#25ModerateLetter and Number Coding