General Studies (Paper I)
BRICS Letter-Order — Remember BRICS expansion order: Original (2009) Brazil-Russia-India-China, then South Africa (2010), then 2024 additions: Egypt-Ethiopia-Iran-UAE-Saudi (invited). Use "EEI US" for the five new members.
Biodiversity Hotspot Count — India has exactly 4 biodiversity hotspots: HIEW = Himalayas, Indo-Burma, Eastern Ghats, Western Ghats. Simple four-letter code covers all competitive exam questions on this topic.
Paris Agreement Key Year — Paris COP21 was 2015; agreement entered force 2016. Remember "21-15-16" = COP number, year signed, year enforced. Kyoto was 1997 for contrast (both end in 7: COP3 1997).
Poverty Line Rangarajan — Rangarajan Committee (2014) set urban poverty at ₹47/day, rural at ₹32/day. Mnemonic: "Urban 4+7=11, Rural 3+2=5" — urban is higher, numbers add to different sums.
SDG Year Anchors — SDGs adopted 2015, target year 2030. Millennium Development Goals were 2000-2015. Simple: "Millennium=2000s, Sustainable=2015-2030" — each gets 15-year window.
RAMSAR Convention Year — Signed 1971 in Ramsar, Iran. Remember "71 wetlands treaty". India joined 1982 (11 years later). Chilika was first Indian site (1981, one year before joining).
Manipur — History, Culture, Geography & Administration
Classical Dance Recognition — Manipuri got Sangeet Natak Akademi recognition in 1955. Remember: "5-5 rhythm" (1955) or link to Manipuri's five core dance forms: Ras, Sankirtana, Thang-Ta, Pung Cholom, Maibi.
Sagol Kangjei Polo Rule — Traditional Manipuri polo uses 7 players per side on smallest ponies (not 4 like modern polo). "Sagol = Seven" — both start with 'S', distinguishes it from Western variant.
Lai Haraoba Meaning — Lai Haraoba = "Merrymaking of the Gods". Oldest Manipuri festival, predates Vaishnavism. Remember: "Lai = deity, Haraoba = pleasure" — literal translation helps recall significance as pre-Hindu ritual.
Manipur Districts Number — Manipur has 16 districts (as of 2016 reorganization). Use "M=13th letter, add 3 = 16 districts" or remember the four valley districts: BISW = Bishnupur, Imphal East, Imphal West, Thoubal.
Loktak Lake Location — Loktak is in Bishnupur district, largest freshwater lake in NE India. "Loktak = B" (both have circular letters). Keibul Lamjao (only floating NP) floats on its southern part.
Kangla Fort History — Kangla = ancient capital, 1891 = British captured it (end of Manipur kingdom), 2004 = returned to state by Indian Army. "91-04" = two key restoration dates separated by 113 years.
Act East Policy Year — Renamed from "Look East" in 2014 at East Asia Summit. "Look→Act = 2014" coincides with Modi govt formation. Manipur is gateway, shares 398 km Myanmar border.
Ima Keithel Unique Fact — Asia's largest all-women market (3,000+ vendors). "Ima = Mother" in Manipuri. Located in Imphal, runs entirely by "3M": Mothers, Married women, Manipulation-free traditional commerce.
Civil Services Aptitude Test (Paper II)
BODMAS Trap Alert — Division and Multiplication have equal priority (left-to-right), same for Addition and Subtraction. Many fail: 6÷2×3 = (6÷2)×3 = 9, not 6÷6=1. Always work left-to-right within same priority.
Divisibility by 11 Quick — Alternating digit sum: subtract odd-position digits from even-position. Example: 8536 → (8+3)-(5+6)=0, divisible. If result is 0 or divisible by 11, original number is divisible by 11.
Percentage-Fraction Fast Converts — Memorize: 1/8=12.5%, 1/6=16.67%, 1/7≈14.3%, 1/9=11.11%. For data interpretation, these five fractions (plus standard 1/2, 1/3, 1/4, 1/5) solve 80% of approximation questions instantly.
Venn Diagram Formula — For two sets: Only A = A−(A∩B); Only B = B−(A∩B); Neither = Total−(A+B−A∩B). "Total = A + B − Both + Neither" covers all set-theory DI questions.
Direction Sense Rotations — Clockwise: NEWS (North-East-West-South). Right turn = next letter; left turn = previous letter. 180° = opposite letter. Solves maze/direction questions in under 10 seconds without drawing.
Syllogism Mediate Term Rule — Valid only if middle term is distributed (refers to ALL) at least once. "No conclusion if middle term never universal". Cuts invalid Venn diagrams instantly in logical reasoning.