IBPS RRB Clerk cheat sheet

In a linear arrangement with all persons facing north, 'left' means the person's left (your left when you face the row from the front); when facing south, left and right are reversed.

For blood relations, draw a family tree: vertical line = parent-child, horizontal double line = siblings, and mark gender with + (male) / − (female).

Syllogism: 'All A are B' + 'All B are C' ⇒ 'All A are C' is valid; 'Some A are B' + 'All B are C' ⇒ 'Some A are C' is valid; 'No A is B' + 'All B are C' ⇒ 'No A is C' is valid.

Coding-decoding: check letter shifts (e.g., +1, +2), reversal, or position sums; a common pattern is opposite letters (A↔Z, B↔Y, C↔X).

Inequalities: if A > B ≥ C, then A > C; if A ≥ B = C, then A ≥ C; if A < B ≤ C, then A < C. Chain only same-direction signs.

Direction sense: use a coordinate grid with North = +y, East = +x; final displacement = √(x² + y²) for right-angle turns.

Order and ranking: if a person is nth from the left and mth from the right, total = n + m − 1.

Seating arrangement (circular): for n people facing the centre, the person to the immediate left is n−1 positions clockwise; facing outward, immediate left is clockwise.

Series completion: check differences, squares/cubes, alternating patterns, or letter positions (A=1 … Z=26).

Percentage change = (new − old)/old × 100; successive percentage changes a% then b% give net change = a + b + ab/100.

Simple interest SI = P × R × T / 100; compound interest CI = P[(1 + R/100)^T − 1].

Profit/loss: Profit% = (SP − CP)/CP × 100; if two articles are sold at same price with equal profit% and loss%, overall loss% = (x/10)² where x is the common percentage.

Time and work: if A does a job in x days and B in y days, together they take xy/(x + y) days; use LCM of days as total work units.

Speed, time, distance: D = S × T; for a train of length L crossing a platform of length P, time = (L + P)/S.

Average = sum of observations / number of observations; if each value is increased by k, average increases by k.

Ratio and proportion: if a : b = c : d then ad = bc; to divide amount A in ratio p : q, shares are Ap/(p+q) and Aq/(p+q).

Mensuration: area of circle = πr²; circumference = 2πr; volume of cylinder = πr²h; volume of sphere = (4/3)πr³.

Number series: check differences, ratios, squares/cubes, or prime-based patterns; for wrong-number series, verify each term against the pattern.

Subject-verb agreement: singular subject takes singular verb; 'one of + plural noun' takes a singular verb (e.g., 'One of the boys is').

Articles: 'a' before consonant sounds, 'an' before vowel sounds; 'the' for specific or unique items.

Tenses: present perfect (has/have + past participle) for past actions with present relevance; past perfect (had + past participle) for the earlier of two past actions.

Prepositions: 'since' with a point of time, 'for' with a duration; 'between' for two, 'among' for more than two.

Common error spotting: check for double negatives, misplaced modifiers, wrong comparative forms (e.g., 'more better' is wrong), and parallelism in lists.

Cloze test: read the whole passage first; choose the option that fits both meaning and grammar; elimination works best.

Reading comprehension: answers are usually in the passage; do not use outside knowledge; identify the main idea and tone.

Para jumbles: find the opening sentence (often independent), then link pronouns and connectors (however, therefore, moreover).

Hindi grammar: संधि (स्वर, व्यंजन, विसर्ग), समास (तत्पुरुष, कर्मधारय, द्वंद्व, बहुव्रीहि), and मुहावरे/लोकोक्तियाँ are frequently tested.

Banking basics: RBI was established on 1 April 1935; it nationalised in 1949; it issues currency notes (except one-rupee coins/notes, issued by Government of India).

Types of accounts: savings, current, fixed deposit, recurring deposit; NEFT, RTGS, IMPS are electronic funds transfer systems (RTGS for high-value, minimum ₹2 lakh).

Important financial terms: repo rate (RBI lends to banks), reverse repo (RBI borrows), CRR (cash reserve ratio), SLR (statutory liquidity ratio).

Computer fundamentals: input devices (keyboard, mouse), output devices (monitor, printer), storage units (bit, byte, KB, MB, GB, TB).

Shortcut keys: Ctrl+C copy, Ctrl+V paste, Ctrl+X cut, Ctrl+Z undo, Ctrl+Y redo, Ctrl+S save, Ctrl+P print, Ctrl+F find.

Computer generations: 1st vacuum tubes, 2nd transistors, 3rd integrated circuits, 4th microprocessors, 5th artificial intelligence.

Networking: LAN (local), WAN (wide), IP address identifies a device; HTTP/HTTPS for web, FTP for file transfer, SMTP for sending email.

Indian financial institutions: SEBI regulates securities market, IRDAI insurance, PFRDA pensions; NABARD for agriculture and rural development.

Current affairs (static core): United Nations founded 1945, headquarters New York; World Bank and IMF headquarters Washington, D.C.; WTO headquarters Geneva.