General Awareness & General Knowledge
Bharat Ratna Order — Recipients remember by "PV NaMo": Pranab (2019), Vajpayee (2015), Narayanan (posthumous 2015), Madan Mohan Malaviya (2015). Recent awards follow political timelines—anchor to PM tenures.
Harappan Sites Mnemonic — "CALMR HAD": Chanhudaro, Alamgirpur, Lothal, Mohenjodaro, Ropar, Harappa, Alamgirpur, Dholavira. Helps recall major Indus Valley civilization sites for map-based questions.
Monsoon Months Trick — SW Monsoon: June-September (JJAS). NE Monsoon: October-December (OND). Remember "June Arrives, September Stops" for SW; "October Never Dies" for NE retreat.
Freedom Struggle Timeline — "1857-1919-1942": Sepoy Mutiny (1857), Jallianwala (1919), Quit India (1942). 62-year gaps roughly. Anchor major movements to these three pillars, then fill intermediate events.
Fundamental Rights Articles — "12 to 35": Articles 12-35 cover Fundamental Rights. "14-Equal, 19-Freedoms, 21-Life, 32-Remedies" for quick FR recall during Polity questions.
Vitamins Deficiency Trick — "ABCDE-Night/Bone/Scurvy/Rickets/Sterility": Vit A=Night blindness, B=Beri-beri, C=Scurvy, D=Rickets, E=Sterility. Single-letter mnemonics work fastest under time pressure.
Elementary Mathematics
Divisibility by 11 — Alternating digit sum: difference between odd-place and even-place digit sums must be 0 or 11. For 1331: (1+3)−(3+1)=0, divisible. Instant check without division.
Percentage-Fraction Conversions — Memorize: 1/8=12.5%, 1/6≈16.67%, 1/9≈11.11%, 3/8=37.5%. These four cover 70% of competitive fraction-to-percent conversions; calculate rest from these anchors.
Compound Interest Shortcut — For 2 years: A=P(1+R/100)². Quick: 10% for 2yr = 21% (not 20%). 20% for 2yr = 44% (not 40%). Remember "+1% extra per 10%" rule.
Mensuration Formula Cluster — Circle: πr², 2πr. Sphere: 4πr², (4/3)πr³. Cylinder: 2πrh, πr²h. Remember "Circle×2=Sphere surface, Circle×height=Cylinder volume" for quick derivation.
Time-Distance-Speed Triangle — Cover "D" to get S=D/T, cover "S" to get T=D/S, cover "T" to get D=S×T. Draw inverted triangle: D on top, S and T below.
Quadratic Roots Sum-Product — For ax²+bx+c=0: sum of roots = −b/a, product = c/a. Remember "−b/a, c/a" chant. Reverse-engineer questions asking for root relationships without solving.
Profit% Quick Formula — If CP=100, SP=110 → 10% profit. If SP given first, CP=SP×100/(100+P%). For 20% profit, multiply SP by 5/6. Memorize common ratios: 25%=5:4, 20%=6:5.
Reasoning & Logical Analysis
Blood Relations Gender Trick — Uncle/Aunt's son = Cousin (gender unknown). Brother's wife = Sister-in-law. Father's brother = Uncle. Draw three-generation tree instantly: you-parents-grandparents for complex puzzles.
Coding: Position Value — A=1, Z=26. For reverse: A=26, Z=1. EJOTY (positions 5,10,15,20,25) are anchor letters—calculate others as ±1,±2 from these five benchmarks.
Direction After Turns — Start facing North. Right=E, Right=S, Right=W, Right=N (clockwise "NEWS"). Left turns go anti-clockwise. After 3 rights=1 left. Use finger compass for complex sequences.
Syllogism Venn Quick — "All A are B" = A-circle inside B-circle. "Some A are B" = overlapping circles. "No A are B" = separate circles. Draw in 5 seconds; check conclusion validity against diagram.
Series Pattern Recognition — Check differences first: +2,+4,+6 (arithmetic). Then ratios: ×2,×3,×4 (geometric). Then squares: 2²,3²,4². 80% of series follow these three patterns; test in this order.
Seating Arrangement Clockwise — For circular tables, always draw positions as 12,3,6,9 o'clock first. "Opposite" = 6 positions away in 12-seater, 3 away in 6-seater. Fix one person, arrange others relatively.
English / Bengali / Hindi Language
English Tenses Timeline — Past—Present—Future with "has/have/had" as perfect markers. "Has/Have+V3"=Present Perfect, "Had+V3"=Past Perfect, "Will have+V3"=Future Perfect. V3 signals completion across all tenses.
Subject-Verb Agreement Trick — Singular subjects with "or/nor/either/neither" take singular verbs. "Each/Every" always singular. "Data/Criteria" are plural. Remember "Politics/Mathematics" are singular despite 's' ending.
Idiom Pattern: Body Parts — "Cold feet"=nervous, "Green thumb"=gardening skill, "Costs an arm and leg"=expensive. 40% of idioms use body parts metaphorically; learn clusters by body part.
Bengali Sandhi Quick Rule — স্বর+স্বর often merges: অ+অ=আ, অ+ই=এ. Consonant+vowel follows placement rules. Remember "same vowels lengthen, different vowels harmonize" for 80% of sandhi cases.
Hindi Gender Exceptions — Most '-i' words feminine (रोटी, नदी) BUT चाय, दही, घी masculine. Most '-a' masculine (लड़का) BUT माता, दया feminine. Memorize 10 common exceptions separately.