IBPS RRB PO cheat sheet

Syllogism: convert statements to Venn form; a conclusion is valid only if true in every possible diagram; "some A are B" does not imply "some B are not A".

Blood relations: draw a family tree with gender markers (+ male, − female) and generation rows; never assume gender from a name or profession.

Direction sense: net displacement = vector sum of moves; use Pythagoras for shortest distance when turns are 90°, and remember left/right flips when facing south.

Seating arrangement: fix the reference person first, then place others clockwise/anticlockwise for circular sets; for linear rows, note whether all face north or a mix.

Coding-decoding: check letter positions (A=1 … Z=26); common patterns are ±constant shift, reversal, opposite letters (A↔Z, sum 27), or position-based insertion.

Inequality: chain only same-direction symbols; "A ≥ B > C" gives A > C, but conclusions mixing ≥ and > must match the strict/weak direction exactly.

Order-ranking: total = (rank from top + rank from bottom) − 1; for a class of n with positions p and q, number between them = |p − q| − 1.

Alphanumeric series and input-output: track the shifting rule per step and count only the asked quantity; re-verify the final arrangement against the given rule.

Percentage change: successive changes of a% and b% give net = a + b + ab/100; a rise then equal fall always yields a net decrease of (x²/100)%.

Profit and loss: SP = CP × (100 + P)/100; when two articles are sold at the same price with equal % gain and loss, the seller always incurs a loss of (x/10)² %.

Simple vs compound interest: SI = PRT/100; CI = P[(1 + R/100)^T − 1]; for 2 years the CI − SI gap equals P(R/100)².

Time-speed-distance: convert km/h to m/s by multiplying 5/18; trains of length L1, L2 crossing each other use relative speed (add for opposite, subtract for same direction).

Boats: downstream speed = b + s, upstream = b − s; boat speed = (D + U)/2, stream speed = (D − U)/2.

Averages: new average after adding a value = (old sum + value)/new count; if every item is increased by k, the average rises by exactly k.

Ratio and mixtures: alligation rule - ratio of quantities = (mean − cheaper) : (dearer − mean); repeated dilution leaves final pure = initial × (1 − replaced/total)^n.

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

Permutation vs combination: arrangements use nPr = n!/(n−r)!; selections use nCr = n!/[r!(n−r)!]; divide by repeated factorials for identical items.

RBI was established on 1 April 1935 under the RBI Act 1934 and nationalised in 1949; it regulates banking, money supply and foreign exchange under FEMA.

Policy rates set by the six-member Monetary Policy Committee (MPC), which meets at least four times a year; the repo rate is the key lending rate to banks.

CRR is the share of net demand and time liabilities kept as cash with RBI and earns no interest; SLR is held in approved securities and earns interest.

Priority sector lending target for scheduled commercial banks is 40% of adjusted net bank credit, with 18% for agriculture.

Deposit insurance by DICGC covers up to ₹5 lakh per depositor per bank, covering principal plus interest.

NPA classification: substandard after 90 days overdue, doubtful after 12 months as substandard, loss asset when identified as uncollectible.

Key institutions: SEBI regulates securities markets, IRDAI insurance, PFRDA pensions, NABARD agriculture refinance, SIDBI small industries, EXIM export-import finance.

Government schemes: PMJDY for financial inclusion, MUDRA for micro-enterprises (Shishu, Kishore, Tarun), Stand-Up India for SC/ST and women entrepreneurs.

Reading comprehension: answer strictly from the passage; extreme options (always, never, all) are usually wrong when the passage uses hedged wording.

Error detection: check subject-verb agreement, tense consistency, preposition collocation and article use; one error per sentence is the norm in this format.

Fillers: choose the option that fits both grammar and collocation; test the preposition or verb form that the surrounding words demand.

Para jumbles: find the opening sentence (introduces a noun without pronouns), then link via pronouns, connectors (however, therefore) and repeated keywords.

Cloze test: read the whole passage first; the correct word must satisfy meaning, register and grammatical form, not just topic.

Synonyms and antonyms: match the word's part of speech and contextual sense; a word can have a common antonym that is not the exact opposite in context.

Sentence improvement: prefer concise, grammatically complete options; reject options that change the intended meaning or introduce redundancy.

Hindi section: समास, संधि, उपसर्ग-प्रत्यय, मुहावरे-लोकोक्तियाँ and वाक्य शुद्धि are recurring areas; identify the sandhi type by the changed junction sound.