General Studies and Mental Ability
Divisibility by 11 — Alternating digit sum rule: subtract sum of odd-position digits from even-position digits; if result is 0 or multiple of 11, number is divisible by 11. Quick mental check for large numbers.
BODMAS Trap — Division and Multiplication have EQUAL priority (left-to-right); Addition and Subtraction have EQUAL priority (left-to-right). Don't blindly do all M before D or all A before S.
Calendar Day Formula — Odd days concept: count remainder when total days ÷ 7. Leap year = 2 odd days, normal year = 1 odd day. Anchor: 1-Jan-2000 was Saturday.
Sangam Ages Chronology — "Early Chera Chola, Middle Pandya, Late Together" — Early Sangam (Cheras, Cholas dominate), Middle (Pandyas rise), Late (all three kingdoms documented together). 300 BCE–300 CE span.
Indian Monsoon Months — "JJAS" = June, July, August, September (SW Monsoon). "ON-DJ" = October-November (NE Monsoon retreating), December-January (winter). Covers 75% questions on rainfall patterns.
Constitutional Amendment Numbers — 42nd = "Mini Constitution" (1976, added Fundamental Duties, Socialist-Secular); 44th = removed Right to Property from Fundamental Rights (1978); 52nd = Anti-Defection Law (1985); 73rd-74th = Panchayati Raj & Urban Bodies (1992).
Fundamental Rights Articles — "FARCE" = Freedom (19), Against exploitation (23-24), Right to Constitutional remedies (32), Cultural & Educational (29-30), Equality (14-18). Articles 14-32 span all six FR categories.
Five-Year Plan Priorities — 1st Plan = Agriculture, 2nd = Industry (Mahalanobis model), 3rd = Self-reliance, 5th = "Garibi Hatao", 8th = Human development, 12th = "Faster, Sustainable, Inclusive Growth". Match plan number to decade.
Latitude-Climate Zones — Tropic of Cancer (23.5°N) cuts through 8 Indian states: "GRAM CHAMP" = Gujarat, Rajasthan, Madhya Pradesh, Chhattisgarh, Jharkhand, West Bengal, Tripura, Mizoram (west to east).
UN Specialized Agencies — "WHO FAIML" = WHO (health), FAO (food/agriculture), ILO (labor), IMF (monetary), WB (development). Remember UNESCO (education/culture), UNICEF (children) separately as most-asked.
Indian National Movement
1857 Rebellion Centers — "DMBLK" = Delhi (Bahadur Shah), Meerut (start point), Bareilly (Khan Bahadur), Lucknow (Begum Hazrat Mahal), Kanpur (Nana Sahib), Jhansi (Laxmibai). Six major epicenters, British suppressed by 1858.
Gandhi's Satyagrahas Sequence — Champaran (1917, indigo), Kheda (1918, tax), Ahmedabad (1918, mill workers), then NCM (1920), Salt (1930), Quit India (1942). Mnemonic: "CKA-NaSaQu" for chronology.
Moderates vs Extremists Split — 1907 Surat Session split: Moderates (Gokhale, prayers-petitions-constitutional) vs Extremals (Tilak-Lala-Bipin: Swaraj-Swadeshi-Boycott). "3S vs 3P" = three radical S-words vs three moderate P-words.
Indian Polity and Constitution
President's Veto Powers — Absolute (non-money bill), Suspensive (returned once for reconsideration), Pocket (neither sign nor return, indefinite hold on non-critical bills). Pocket veto most powerful, rarely used.
Rajya Sabha Special Powers — Article 249 (authorize Parliament on State List), Article 312 (create All-India Services). Remember: "2-5-12 formula" = 2 exclusive powers in Article 200s-300s range.
Emergency Types Mnemonic — "NFF" = National (Article 352, war/external/armed rebellion), Financial (360, credit threat), President's Rule/State (356, constitutional machinery failure). Three distinct triggers and scopes.
Geography of India
Western Ghats Passes — North-to-South: Thal Ghat, Bhor Ghat, Pal Ghat, Shencottah Gap. "TBP-She" mnemonic. Bhor connects Mumbai-Pune (most commercial), Pal connects Kerala-Tamil Nadu.
Indian Soil Types (ICAR) — "ALRBD" = Alluvial (43%, most fertile), Laterite (rust-colored, leached), Red (crystalline rock areas), Black (cotton-soil, Deccan), Desert (arid west). Alluvial covers Indo-Gangetic plains.
River Origin Points — Ganga = Gangotri (Uttarakhand), Yamuna = Yamunotri, Brahmaputra = Mansarovar (Tibet), Godavari = Trimbakeshwar (Nashik), Krishna = Mahabaleshwar, Kaveri = Talakaveri (Coorg). Match river to pilgrimage spot for memory.
Indian Economy
Budget Document Types — Three mandatory: Annual Financial Statement (main budget), Finance Bill (tax proposals), Appropriation Bill (withdrawal authorization). Supplementary = Demands for Grants, Vote-on-Account (election year interim), Vote of Credit (undefined emergency).
Inflation Index Baselines — CPI base = 2012, WPI base = 2011-12. CPI for retail/consumer impact, WPI for wholesale/manufacturing. RBI uses CPI for monetary policy since 2014.
Andhra Pradesh Specific Studies
AP Rivers Mnemonic — "GoPeKri-Mu-Ve" = Godavari, Pennar, Krishna (three major), Musi, Vamsadhara (tributaries/smaller). Godavari and Krishna are perennial, Pennar seasonal.
Satavahana Capitals — Pratishthana (Paithan, early), Amaravati (peak), Nagarjunakonda (late). "PAN" sequence = 230 BCE–220 CE dynasty span across Deccan.
Kakatiyas' Four Forts — Warangal (capital), Hanumakonda (twin city), Khammam, Nalgonda. "WHKN" = core defensive quadrilateral, 12th-14th century rule, Rudramadevi most notable queen.
AP Government Schemes — "AAWNY" = Aarogyasri (health insurance), Amma Vodi (mother education support), Welfare hostels, YSR schemes (Rythu Bharosa, Pension Kanuka). YSR prefix dominates current scheme names.
AP Bifurcation Schedule — AP Reorganization Act 2014, effective 2-June-2014. Hyderabad = joint capital for 10 years (till 2024), Amaravati planned as new AP capital, Chandrababu Naidu first CM post-split.
Panchayat Raj and Rural Development
73rd Amendment Subjects — 11th Schedule has 29 subjects: "ABCDEF rule" = Agriculture, Bridges, Cottage industries, Drinking water, Education (primary), Fuel (firewood). Core rural governance transferred to PRIs.
Three-Tier Structure — Gram Panchayat (village), Mandal/Block Panchayat (intermediate), Zilla Parishad (district). Minimum village population thresholds vary by