History — India & AP
Harappan Sites (A-M-L-D-R) — Remember "A Mad Lion Dances Rapidly": Alipur, Mohenjo-daro, Lothal, Dholavira, Rakhigarhi for major Indus Valley sites.
Satavahana Capitals — "PrAP" mnemonic: Pratishthana (early), Amaravati, Paithan (later) for Satavahana dynasty's major administrative centers in Andhra region.
Mughal Rulers (B-H-A-J-S-A-A) — "Busy Historians Always Judge Successful Administrations Accurately": Babur, Humayun, Akbar, Jahangir, Shah Jahan, Aurangzeb, Aurangzeb's successors (to remember sequence).
1857 Revolt Centers — "My Dear Little Brother": Meerut, Delhi, Lucknow, Bareilly for main revolt epicenters.
Vijayanagara Dynasty Order — "Sun Shines Brightly Today": Sangama, Saluva, Tuluva, Aravidu dynasties in chronological order.
Geography — India & AP
Indian Coastal Plains — "Kon-Gu-Co-Ma" from north to south: Konkan, Gujarat (Kathiawar), Coromandel, Malabar coasts.
Rivers Joining Ganga (Right Bank) — "Y-S-T-G": Yamuna, Son, Tons, Ghaghara flow from right (south) into Ganga—helps in map questions.
AP River Origins — "Go-Pe-Kr" for major AP rivers: Godavari (Maharashtra), Pennar (Karnataka), Krishna (Maharashtra)—all originate outside AP.
Soil Types (A-B-R-L-M) — "All Boys Run Like Mad": Alluvial, Black, Red, Laterite, Mountain soils—five major Indian soil types.
Latitude/Longitude Trick — "Lat is Flat": Latitude lines run horizontally (flat), Longitude lines run vertically (like "Long" poles).
Indian Polity & Governance
Fundamental Rights (6 Articles) — "14-19-20-21-23-24" sequence: Equality (14-18), Freedom (19-22), Exploitation (23-24), Religion (25-28), Culture (29-30), Constitutional Remedies (32).
Citizenship Loss (3 Ways) — "ReTu-Re": Renunciation, Termination (by govt), Reprivation (for fraud/disloyalty)—three ways only, not forfeiture.
Money Bill Certification — "110 Speaker Money": Article 110 + Speaker certifies Money Bills (not Chairman, not President).
Panchayat 3-Tier — "Village-Block-District": Gram Panchayat, Panchayat Samiti/Mandal, Zilla Parishad—bottom to top order, never confuse.
Governor's Ordinance Power — "213-Ordinance-6-6": Article 213, valid 6 weeks after assembly reconvenes, maximum 6 months + 6 weeks total life.
Indian Economy
Budget Types — "Surplus-Balanced-Deficit": Revenue exceeds expenditure (surplus), equals (balanced), falls short (deficit)—test often asks definitions.
Direct Tax Examples — "I-C-W-G": Income Tax, Corporation Tax, Wealth Tax, Gift Tax are direct (paid by same person who bears burden).
NITI Aayog Composition — "PM-VP-Cabinet-CM-Expert": PM (Chair), VP (Vice-Chair), Cabinet Ministers, CMs (Governing Council), Expert members—hierarchy matters.
GDP vs GNP — "GDP Place, GNP People": GDP counts production in geographic boundaries, GNP counts production by nationals wherever located.
General Science
Vitamin Deficiency — "A-B1-B12-C-D-K" as "ABCD-K": A(night blindness), B1(beriberi), B12(anemia), C(scurvy), D(rickets), K(bleeding).
Planet Order — "My Very Educated Mother Just Served Us Nachos": Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune from Sun.
pH Scale Memory — "0-7-14 rule": 0-7 acidic, 7 neutral, 7-14 basic; each number represents 10x concentration change.
Newton's Laws Quick — "I-F-A": Inertia (1st law), F=ma (2nd law), Action-Reaction (3rd law)—sequence and keywords.
Mental Ability & Reasoning
Divisibility by 11 — "Alternate Sum Difference": Sum odd-position digits minus sum even-position digits; if result divisible by 11, original number is too (e.g., 121: 1+1-2=0, divisible).
Calendar Day Calculation — "Odd Days Method": Ordinary year=1 odd day, leap=2; count total odd days÷7, remainder gives day shift (0=Sunday, 1=Monday, etc.).
Blood Relations Base — "Mother's side Maternal, Father's Paternal": Maternal uncle=mother's brother, Paternal aunt=father's sister—prefix tells the side.
Direction Sense — "Clockwise N-E-S-W": Turning right=clockwise (North→East→South→West); left=anticlockwise—draw quick compass for complex questions.
IC Engines & Automobile Fundamentals
4-Stroke Cycle — "SUCK-SQUEEZE-BANG-BLOW": Suction (intake), Compression, Power (combustion), Exhaust—Otto/Diesel cycle strokes in order.
Engine Cooling Types — "Air-Water-Oil": Three primary cooling methods; water cooling uses radiator+pump, air uses fins, oil serves dual lubrication+cooling role.
Octane vs Cetane — "Octane Petrol, Cetane Diesel": Octane rating for petrol (anti-knock), Cetane rating for diesel (ignition quality)—never mix these up.
Emission Norms — "BS follows Euro": Bharat Stage (BS) standards based on European norms; BS-VI = Euro-VI equivalent (direct correspondence for exam purposes).