General Knowledge and Current Affairs
First Five-Year Plan Anchor — India's 1st Five-Year Plan started in 1951; add 5 years repeatedly (1956, 1961…) to track plan periods, remembering the 3-year gap (1966–69) during wars created "plan holidays."
UN Founding Year = Birth of Independence — UN founded 1945; India independence 1947 = 2 years after UN. Both post-WWII milestones, easy to anchor together for international affairs questions.
BRICS Letter Order = Founding Sequence — Brazil, Russia, India, China formed BRIC (2009); South Africa joined 2010. Remember "BRICS" spelling = chronological joining order for summits.
Padma Award Hierarchy = Cricket Runs — Bharat Ratna (highest, like 100), Padma Vibhushan (50s), Padma Bhushan (30s), Padma Shri (lowest, single digits). Descending "score" logic for award ranks.
State Formation by Decades — 1960s = linguistic states (Gujarat, Maharashtra split); 2000s = three tribal states (Chhattisgarh, Jharkhand, Uttarakhand all in Nov 2000); 2014 = Telangana. Decade clustering aids recall.
Indian Constitution and Polity
DPSP Non-Justiciable = "Principles, Not Police" — Directive Principles = guidelines for state policy, cannot be enforced in court. Think "moral compass without handcuffs"—unlike Fundamental Rights which are justiciable.
Six Fundamental Rights via SCREEEF — Speech (19), Constitutional remedies (32), Equality (14-18), Exploitation prohibition (23-24), Freedom of religion (25-28), Education/culture (29-30). Drop "Property" (deleted 1978).
Preamble 4 Pillars = SJEL — Sovereign, Justice, Equality, Liberty. Remember "SoJEL" (social gel)—the binding values. Fraternity comes fifth, added by 42nd Amendment keywords "Socialist, Secular, Integrity."
Emergency Types = 3 Articles, 3 Threats — Article 352 (war/external), 356 (state govt failure/"President's Rule"), 360 (financial). Match number pattern: 352÷2=176, 356÷2=178, 360÷2=180 (even splits).
Money Bill = Article 110, Only Lok Sabha Start — Remember "110 = Money Phone Hotline" starts in Lower House only; Rajya Sabha can only recommend (14 days), cannot reject or amend.
Simple Arithmetic and Mental Ability
Divisibility by 11 = Alternating Sum — Subtract odd-positioned digits from even-positioned digits; if result is 0 or multiple of 11, original number divides by 11. Example: 121→(1+1)–2=0, divisible.
Calendar Day Formula = Odd Days — Each normal year = 1 odd day; leap year = 2 odd days. Count total odd days ÷7, remainder gives day shift. Anchor: 1 Jan 1900 = Monday.
Clock Angle = |11M – 60H|/2 — To find angle between hour and minute hands: multiply minutes by 11, subtract 60×hours, take absolute value, divide by 2. Gives degrees between hands.
Blood Relations Gender Trap — "A's father's only son" = A himself (if A is male) or A's brother (if female). Always check gender before concluding relationships; "only" is the key word.
Direction Sense = NESW Circle — Draw clockwise N-E-S-W circle. Right turn = next letter clockwise; left turn = previous letter. 180° turn = opposite letter. Trace with finger for complex paths.
Number Series Gaps — Check differences between consecutive terms first (1st level), then differences of differences (2nd level). Most PSC series break at 2nd level—constant or pattern emerges there.
Simple Arithmetic and Mental Ability (continued)
Percentage-Fraction Quick Converts — 1/8=12.5%, 1/6=16.67%, 1/3=33.33%, 3/8=37.5%, 2/3=66.67%, 5/8=62.5%, 7/8=87.5%. Memorize these 7 for instant percentage-fraction switches without calculation.
SI vs CI First Year Trick — Simple and Compound Interest are EQUAL for first year only. If question asks "difference after 1 year," answer is always zero—no calculation needed.
Time-Distance-Speed Triangle — Draw triangle: Distance on top, Time and Speed at base. Cover what you need; remaining two show formula. Cover Distance = Time×Speed; Cover Time = Distance/Speed, etc.
Work Formula = 1/Total Days — If A completes work in 10 days, A's 1-day work = 1/10. Combined work = sum of individual fractions. To find days together: 1/(sum of work rates).
LCM×HCF = Product of Two Numbers — For any two numbers, their LCM multiplied by HCF always equals the product of the original numbers. Use to find missing value when three are given.
General Science
VIBGYOR for Spectrum — Violet, Indigo, Blue, Green, Yellow, Orange, Red—increasing wavelength order. Remember "Vibrant colors" from short (violet, highest energy) to long (red, lowest energy) wavelengths.
Mohs Hardness via "The Girls Can Flirt" — Talc (1), Gypsum (2), Calcite (3), Fluorite (4), then Apatite, Orthoclase, Quartz, Topaz, Corundum, Diamond (10). First 4 letters = TGCF mnemonic anchor.
pH Memory = 7 Pure, <7 Acid, >7 Base — Pure water = pH 7 (neutral). Numbers "falling below" 7 = acids (like stomach acid pH 2); numbers "rising above" 7 = bases (soap pH 10).
Vitamin Deficiency Diseases — A=Night blindness, B1=Beriberi, B3=Pellagra, C=Scurvy, D=Rickets, K=Blood clotting issues. Remember "ABCDK" skipping E, with "C for Sea-scurvy" (sailors' disease) as anchor.
Endocrine Glands = "P.P.T.A.T.O.T" — Pineal, Pituitary, Thyroid, Adrenal, Thymus, Ovaries/Testes. Seven ductless glands releasing hormones directly into blood; "two P's start, two T's end" pattern.
General English
Fewer vs Less Rule — "Fewer" for countable items (fewer apples, fewer people); "less" for uncountable mass (less water, less time). If you can count it individually, use "fewer."
Affect vs Effect — "Affect" is usually a verb (to influence); "Effect" is usually a noun (the result). Remember: "The Arrow Affects the target; the Effect is the hole."