General Tamil
Aikaaram Mnemonic (உயிர்மெய்) — Remember 18 consonants with "க ச ட த ப ற ஞ ங ண ந ம ன ய ர ல வ ழ ள" using the phrase "கசடதப றஞஙணநம னயரலவழள" (Vallinam-Mellinam-Idaiyinam grouping: first 6 hard, next 6 soft, last 6 middle sounds).
Five Great Epics Mnemonic — "செமா சிகு மணி" (SeMaa SiKu MaNi): செயூர் (Seevaka Chinthamani), மாணிமேகலை (Manimekalai), சிலப்பதிகாரம் (Silappathikaram), குண்டலகேசி (Kundalakesi), மணி (Valayapathi) — covers all five Tamil Kappiyams.
Silappathikaram Structure — Three Kandam remembered as "PuMaVa": Puhar Kandam (Kannagi-Kovalan Poompuhar life), Mathurai Kandam (anklet trial, city burning), Vanji Kandam (goddess consecration) — story progression by city.
Thirukkural Division — Remember 3 sections as "ARM": Aram (Virtue, chapters 1-38), Porul (Wealth, 39-108), Inbam (Love, 109-133) — but mnemonic "அறம் பொருள் இன்பம்" itself is the trick, 1330 couplets = 133 chapters × 10.
Sandhi Rules (புணர்ச்சி) — When உ+அ meets, becomes வ: remember "உயிர் ஒற்று வல்லினம்" — vowel-consonant-hard letter sequence determines whether insertion happens; practice "தமிழ் + இலக்கியம் = தமிழிலக்கியம்" (no change) vs "நல்ல + ஆசிரியர் = நல்லாசிரியர்" (doubling).
General Studies
Mauryan Rulers Order — "CBA-Dasas": Chandragupta, Bindusara, Ashoka, then seven weak rulers ending with Brihadratha — first three are the mighty empire builders (322-185 BCE).
Indian National Congress Presidents Trick — "BANG" for early moderates: Badruddin Tyabji (1887, first Muslim), Annie Besant (1917, first woman), Naoroji (1886, first president), Gokhale (1905) — milestone presidencies for competitive exams.
1857 Revolt Centers — "DELHI-BKM": Delhi (Bahadur Shah), Eastern (Nana Sahib-Kanpur), Lucknow (Begum Hazrat Mahal), Highland (Kunwar Singh-Bihar), I(Jhansi-Rani), Barrackpore (Mangal Pandey), Kanpur, Meerut (starting point).
Five-Year Plan Focus — Odd plans focus growth/industry (1st-steel, 3rd-self-reliance, 5th-poverty); Even plans stabilize (2nd-heavy industry, 4th-agriculture post-drought, 6th-liberalization prep) — odd pushes, even balances pattern till 12th Plan (2012-17).
Monetary Policy Tools — "RRLOCS": Repo Rate, Reverse Repo, Legal Reserve Ratio (SLR), Open Market Operations, CRR (Cash Reserve Ratio), Statutory measures — six RBI weapons to control money supply and inflation.
Tamil Nadu Districts Border Trick — 38 districts: remember "Coimbatore touches Kerala AND Karnataka" (only TN district touching 2 states); Tiruvallur-Chennai-Kanchipuram form urban triad; Kanniyakumari is southernmost tip — geographic anchors for map questions.
Aptitude and Mental Ability Test
Divisibility by 11 Trick — Alternating digit sum: Take odd-position digits sum minus even-position digits sum; if result is 0 or multiple of 11, number is divisible (e.g., 121: 1+1=2, middle 2: 2-2=0, divisible).
LCM-HCF Product Rule — Product of two numbers = LCM × HCF always; if any three values known, fourth is instant: 12×18 = 216, HCF=6, so LCM = 216÷6 = 36 — saves long calculation.
Percentage-Fraction Quick Conversions — Memorize: 12.5%=1/8, 16.67%=1/6, 20%=1/5, 33.33%=1/3, 37.5%=3/8, 62.5%=5/8, 66.67%=2/3, 83.33%=5/6 — instant calculation in comparison questions without calculator.
Time-Distance-Speed Triangle — Draw triangle: Distance on top, Time and Speed at bottom; Cover what you need (Distance = Speed × Time, Speed = Distance/Time, Time = Distance/Speed) — visual mnemonic prevents formula confusion.
Compound Interest Shortcut — For 2 years: CI - SI = (R/100) × SI, where SI is simple interest; for 3 years: extra interest = SI × R/100 × (300+R)/10000 — avoids repetitive compounding calculations.
Ratio Multiplication Trick — To combine A:B and B:C, make middle term equal: A:B = 3:4 and B:C = 5:6, multiply first by 5, second by 4 → 15:20 and 20:24 → A:B:C = 15:20:24 directly.
Calendar Day-Finding (Odd Days) — Ordinary year = 1 odd day, leap = 2 odd days; century years: 1600/2000=0 odd days, 1700/1800/1900=5 odd days; sum total odd days ÷ 7, remainder tells day (0=Sun, 1=Mon... 6=Sat).
Dice Opposite Faces Rule — Standard die: opposite faces sum to 7 (1-6, 2-5, 3-4); in unfolded net problems, faces sharing edges cannot be opposite — eliminates wrong options in dice-visualization questions instantly.
Alphanumeric Series Pattern — Check differences: if constant, it's arithmetic; if difference increases by constant, quadratic; for letters, A=1, Z=26 position values; mixed series: separate numbers and letters, solve parallel sequences independently.
Work Efficiency Method — Convert days to work rates: A does in 10 days (efficiency 10%), B in 15 days (6.67%); together = 10+6.67 = 16.67% per day, so 100÷16.67 = 6 days — avoids LCM of work units.