Logical Reasoning is 15 questions in 25 minutes and is widely rated the toughest section of the Infosys test. It mixes quick pattern questions (series, analogies, coding-decoding) with time-consuming ones (cryptarithmetic, seating arrangements) — knowing which to attempt first is half the battle.
What the reasoning section covers
- Cryptarithmetic puzzles — so important for Infosys that we built a dedicated practice page
- Number series and letter–number analogies
- Coding-decoding and coded operations
- Ranking and seating arrangements
- Mathematical operations (sign interchange, symbol substitution)
- Syllogisms and logical deduction
Practice Infosys reasoning questions
Q1Number Series
Find the missing number in the sequence: 25, 36, 49, ?, 81
Q2Letter–Number Analogy
F : 216 :: L : ?
Q3Coded Operations
If 264 * 2 = 6 and 870 * 3 = 11, then what should 735 * 5 be?
Strategy: sweep the quick wins first (series, analogies, coded operations — under 60 seconds each), then invest the saved time in cryptarithmetic and arrangements. Never open the section with a cryptarithmetic problem.