Reasoning Ability
Reasoning Ability tests whether you can extract a rule from unfamiliar material and apply it without adding assumptions. The HPSCB Junior Clerk paper usually includes syllogisms, seating arrangements, coding-decoding, blood relations, number/letter series and inequalities; accuracy matters more than attempting every puzzle.
Core rules
- In syllogisms, draw only what the statements force. 'Some A are B' does not imply 'some B are not A'; 'All A are B' does not imply 'All B are A'.
- For linear seating, fix one person or end first and mark left/right from that person's facing direction. In circular arrangements, facing centre reverses clockwise/anticlockwise.
- In coding-decoding, check letter position shifts, reversal and word-position patterns before trying arbitrary substitutions.
- In inequalities, combine only same-direction signs; 'A > B ≥ C' gives A > C, but 'A > B < C' gives no relation between A and C.
Worked example
Series: 2, 6, 12, 20, 30, ? Reasoning: differences are 4, 6, 8, 10, so the next difference is 12; 30 + 12 = 42. Equivalently, terms are 1×2, 2×3, 3×4, 4×5, 5×6, so the next is 6×7 = 42.
Traps
Do not import real-world knowledge into syllogisms. Do not assume 'some' means 'some but not all'. In seating, a common error is reversing left and right after a turn. In series, check two-level differences and multiplication before guessing.