SSC CGL tricks & mnemonics — save minutes on exam day
Subject-wise short tricks and memory hacks for SSC Combined Graduate Level (Tier 1). Each one is meant to be used in the exam hall — read it, then lock it in with a quick practice question.
Blood Relations: Gender-Neutral Rule — Mother's/Father's brother = Uncle; Mother's/Father's sister = Aunt; Brother's/Sister's son = Nephew; Brother's/Sister's daughter = Niece. Always trace from the reference person outward step-by-step.
Directions: NEWS Clock Method — Imagine a clock: North=12, East=3, South=6, West=9. Right turn = clockwise (+90°), Left turn = anticlockwise (−90°), About turn = 180°. Track net angle to find final direction.
Coding: Letter-Position Values — A=1, B=2...Z=26. For reverse: A=26, B=25...Z=1. Common pattern: add/subtract fixed number or reverse position. Always check if vowels/consonants treated separately.
Dice Opposite Faces — In standard dice: 1-6, 2-5, 3-4 are opposite pairs. If two faces shown adjacent in a view, the third pair's faces are on top/bottom.
Mirror Image: ATOHVWXYM Rule — Letters A, T, O, H, V, W, X, Y, M look identical in vertical mirror. All others invert horizontally; numbers 0, 1, 8 stay same.
Syllogism: Euler Diagram Method — Draw circles for each category. "All A are B" = A-circle inside B-circle. "Some A are B" = overlapping circles. "No A are B" = separate circles. Visual test each conclusion.
General Awareness
Indian Freedom Struggle Dates: 1857-1947 — Remember 1857 (Revolt), 1885 (Congress formed), 1905 (Bengal Partition), 1919 (Jallianwala), 1930 (Salt March), 1942 (Quit India), 1947 (Independence) — 9-decade span, major events every 15-25 years.
Indian Constitution: Date 26s — 26 Jan 1950 (Republic Day = Constitution enforced), 26 Nov 1949 (Constitution adopted), 26 Jan 1930 (Purna Swaraj Day). The number 26 anchors constitutional milestones.
Divisibility by 11 — Alternating digit sum: (sum of odd-position digits) − (sum of even-position digits) must be 0 or multiple of 11. Example: 121→(1+1)−2=0, divisible.
Percentage-Fraction Quick Converts — 12.5%=1/8, 16.67%=1/6, 20%=1/5, 25%=1/4, 33.33%=1/3, 50%=1/2, 66.67%=2/3, 75%=3/4. Memorize these eight for instant mental math.
Profit/Loss Formula Shortcut — If CP=100, then SP=100+Profit% or 100−Loss%. Two successive discounts d1%, d2%: Net = d1+d2−(d1×d2)/100. Same for hikes.
SI vs CI for 2 Years — Difference = P×(R/100)². For 3 years: P×R²×(300+R)/100³. This difference question appears every SSC cycle—memorize the formulas.
Average: New Member Formula — New Average = Old Avg + (Difference × Number of new members)/(Total members). If one leaves: new avg = old avg + (old−leaver)/(remaining).
Mixture Alligation: Cross Method — Draw X: Mean in center, cheaper/dearer on left/right top corners, differences (cross-subtract) in opposite bottom corners. Ratio = bottom-left : bottom-right.
Geometry: Angle-Sum Polygons — Sum of interior angles = (n−2)×180°. Each interior angle of regular n-gon = (n−2)×180°/n. Exterior angle sum always 360°.
Number System: Cyclicity of Last Digits — 2(4-cycle):2,4,8,6; 3(4):3,9,7,1; 4(2):4,6; 7(4):7,9,3,1; 8(4):8,4,2,6; 9(2):9,1. Divide exponent by cycle-length, remainder gives position.
English Comprehension
Active↔Passive Structure — Active: Subject+Verb+Object → Passive: Object+is/am/are/was/were+V3+by+Subject. Tense stays same; by-agent often droppable if obvious.
Idioms: Body-Parts Category — "Cost an arm and a leg"=expensive; "Cold feet"=nervous; "By heart"=memorize; "Green thumb"=gardening skill; "Sweet tooth"=love sweets. Group by theme: 20 body, 20 animal, 20 color idioms.