Reasoning, Logic & Computer Knowledge
BODMAS Order — Brackets, Orders (powers/roots), Division, Multiplication, Addition, Subtraction. Remember: Big Oranges Don't Make Any Sense. Apply left-to-right for equal-priority operations (DM or AS).
Clock Angle Formula — Angle between hands = |11M - 60H|/2 degrees, where H=hour, M=minutes. At 3:15, |11(15) - 60(3)|/2 = 7.5°. Saves calculation time.
Direction Sense: NESW Circle — Clockwise: Never Eat Sour Watermelon. Right turn = next letter clockwise; left turn = anticlockwise. 90° right from North = East.
Blood Relations: Generation Levels — Map vertically: Grandparent (top), Parent, Self, Child, Grandchild (bottom). Sideways = siblings/cousins. Mother's brother = Uncle. Father's sister = Aunt. Visualize family tree instantly.
Divisibility by 11 — Alternating digit sum: subtract odd-position digits from even-position. If result is 0 or multiple of 11, divisible. Example: 2728 → (7+8)-(2+2)=11, divisible.
Mirror Image Rule — Left↔Right swap only; top-bottom unchanged. Letters with vertical symmetry (A, H, I, M, O, T, U, V, W, X, Y) look same. Asymmetric letters reverse: b↔d, p↔q.
Calendar: Odd Days Method — Ordinary year=1 odd day, leap year=2. Century: 400-multiple=0, else check. Month code: Jan=0, Feb=3, Mar=3, Apr=6, May=1, Jun=4, Jul=6, Aug=2, Sep=5, Oct=0, Nov=3, Dec=5.
IP Address Classes (A-E) — Apple (1-126, /8), Banana (128-191, /16), Cherry (192-223, /24), Dates (224-239, multicast), Experimental (240-255). First octet determines class instantly.
General Knowledge, Social Studies & Current Affairs
Indian Freedom Struggle Timeline — 1857 (Revolt), 1885 (Congress), 1905 (Bengal Partition), 1919 (Jallianwala), 1930 (Salt March), 1942 (Quit India), 1947 (Independence). LEAP years anchor events: '57-'85-'05-'19-'30-'42-'47.
Indian Constitution Parts — 8 Parts: 1-States, 2-Citizenship, 3-Fundamental Rights, 4-DPSP, 5-Union, 6-States, 7-First Schedule Areas, 8-Union Territories. 12 Schedules recently added (originally 8).
Latitude Tricks — Tropic of Cancer: 23.5°N (passes through 8 Indian states: Gujarat, Rajasthan, MP, Chhattisgarh, Jharkhand, WB, Tripura, Mizoram — GRM CJ WTM). Equator=0°, Poles=90°.
Fundamental Rights (6 Articles) — Articles 14-32: Equality (14-18), Freedom (19-22), Exploitation (23-24), Religion (25-28), Culture/Education (29-30), Constitutional Remedies (32). Remember: EFERCR order.
Sangam Literature — Ettuthokai (8 anthologies) + Pattupattu (10 idylls) = 18 texts. Oldest Tamil works. Period: 300 BCE-300 CE. Themes: love (akam) and war (puram).
Atmospheric Layers — Troposphere, Stratosphere, Mesosphere, Thermosphere, Exosphere. Mnemonic: The Smart Man Taught Everything. Temperature decreases in Tropo/Meso, increases in Strato/Thermo.
Vitamin Deficiency Diseases — A=Night blindness, B1=Beriberi, B3=Pellagra, C=Scurvy, D=Rickets, E=Sterility, K=Bleeding. Mnemonic: A Night, B Brings Problems, C Causes Decay, D Deforms, K Kills (clotting).
Laws Regarding Crimes Against Women & Children
POCSO Age Limit — Under 18 years = child. Penetrative sexual assault: minimum 10 years, aggravated = 20 years to life. No bail for accused under Section 15 (attempt).
Domestic Violence Act 2005 — PWDVA covers physical, sexual, verbal, economic, emotional abuse. Protection Officers in every district. Residence orders, monetary relief, custody orders available. Applies to women in domestic relationships.
Dowry Death: Section 302/304B BNS — Death within 7 years of marriage + cruelty/dowry demand = dowry death. Burden of proof on accused. Punishment: imprisonment for life. Dowry Prohibition Act: 3 sides punished (giving, taking, demanding).
Child Marriage Act 2006 — Girls under 18, boys under 21 = child marriage. Voidable at option of contracting party. Punishment: 2 years imprisonment + ₹1 lakh fine. Solemnizing adult: rigorous imprisonment.
Juvenile Justice Act 2015 — Child = under 18. Categories: Child in Conflict with Law (CCL), Child in Need of Care & Protection (CNCP). 16-18 heinous offenders tried as adults. JJBs have magistrate powers.
Women Helplines — 181 (Women Helpline), 1091 (Women Power Helpline), 1098 (Childline), 1290 (Railway Women Helpline). Mnemonic: 181 for 1 woman, 1098 for 10-year-old kid.
Rajasthan — History, Geography, Culture, Economy, Polity
Rajasthan Formation Date — 1 November 1956 (Rajasthan Diwas). 7-stage integration (1948-56). Jaipur=capital. Largest state by area (3.42 lakh km²), 7th by population.
Rajasthan Districts — 50 districts (2023), 7 divisions: Jaipur, Jodhpur, Bharatpur, Ajmer, Kota, Bikaner, Udaipur. Newest: Pratapgarh (2008). Jaipur most populous, Jaisalmer largest by area.
Aravalli Range — Guru Shikhar (Mount Abu, 1,722m) = highest peak. Runs SW to NE across Rajasthan. Divides state into 60% desert (west), 40% plain/hills (east). Oldest fold mountains.
Rajasthan Rivers — Only Chambal is perennial (flows year-round). Luni = largest (non-perennial), ends in Rann of Kutch. Banas = longest tributary of Chambal. No river reaches sea directly.
Rajasthan Minerals — Zinc: 1st (Zawar mines), Marble: 1st (90% India), Gypsum: 1st, Sandstone: 1st. Mnemonic: Zawar Marble Gypsum Sandstone = ZMGS for top 4.
Major Fairs — Pushkar (