IDBI JAM cheat sheet

Syllogism: 'All A are B' + 'All B are C' gives 'All A are C'; 'Some A are B' + 'All B are C' gives 'Some A are C'. A conclusion is valid only if true in every possible Venn arrangement of the premises.

Blood relations: draw a family tree and mark gender explicitly. Vertical line = parent-child generation, horizontal = spouse or sibling. Never infer gender from a name alone.

Direction sense: use a coordinate grid with North = +y, East = +x. Final distance = sqrt(x^2 + y^2); final direction from the sign of x and y. Pythagorean triples (3-4-5, 5-12-13, 8-15-17) cover most questions.

Coding-decoding: check letter positions (A=1 ... Z=26). Common patterns are +n/-n shifts, reversal of the word, opposite letter (A-Z, B-Y, i.e. sum of positions = 27), and position-value arithmetic.

Series: for number series test differences, then ratios, then squares/cubes ± constant, then alternating or prime-based patterns. In letter series convert to numbers before testing shifts.

Seating arrangement: fix the most constrained person first, then place people with two or more clues. For circular arrangements facing the centre, left = clockwise and right = anticlockwise; reverse this when facing outward.

Inequality: 'A > B ≥ C' means A > C and B ≥ C. A conclusion with '≥' or '=' is valid only when the chain guarantees equality or strict inequality as stated.

Ranking: if a person is nth from the left and mth from the right in a row of N, then N = n + m - 1. For two people, total = (sum of their ranks from one end) - (difference of ranks from the other end) - 1.

Puzzles: count entities and attributes, build a table, and eliminate. If a clue says 'either-or', do not treat it as a fixed assignment; test both branches against the remaining clues.

RBI was established on 1 April 1935 under the RBI Act, 1934, and nationalised on 1 January 1949. Its headquarters moved from Kolkata to Mumbai in 1937.

Monetary policy is set by the six-member Monetary Policy Committee (MPC); the RBI Governor has the casting vote. The flexible inflation target is 4% CPI with a tolerance band of 2%-6%.

Banking regulation tools: CRR and SLR are statutory reserves, repo and reverse repo are liquidity operations, and the Liquidity Adjustment Facility and MSF form the corridor around the policy repo rate.

IDBI Bank was founded in 1964; IDBI was converted into a bank in 2004, and LIC acquired a majority stake in 2019. The exam-conducting body for this recruitment is IDBI Bank itself.

Priority Sector Lending targets: 40% of adjusted net bank credit for commercial banks overall, with sub-targets of 18% for agriculture, 7.5% for micro enterprises, and 12% for weaker sections.

Important financial institutions: SEBI (1988, statutory 1992) regulates securities markets; IRDAI (1999) regulates insurance; NABARD (1982) handles rural credit; SIDBI (1990) handles MSME finance.

National income concepts: GDP at market prices = GVA at basic prices + product taxes - product subsidies. Real growth is measured at constant prices, nominal at current prices.

Constitutional facts: the President is elected by an electoral college; Article 324 covers the Election Commission; the Finance Commission is constituted every five years under Article 280.

Current-affairs anchors worth memorising: Union Budget date (1 February), Economic Survey before the Budget, and the RBI's bi-monthly MPC announcement schedule.

Subject-verb agreement: 'one of the + plural noun' takes a singular verb; 'either/neither of' takes a singular verb; collective nouns take a singular verb when acting as a unit.

Articles: 'a' before consonant sounds (a university, a one-rupee coin), 'an' before vowel sounds (an hour, an MLA). Use 'the' for superlatives, unique entities and rivers or ranges.

Tenses: after 'since' or 'for' with an ongoing action use present perfect continuous; in conditional type 2 (If + past simple) the main clause takes 'would + base verb'.

Prepositions: 'discuss' and 'comprise' take no preposition; 'comprise' is never followed by 'of'. Use 'composed of', 'consist of', 'deprived of', 'capable of', 'prefer to'.

Common error pairs: 'advice' (noun) vs 'advise' (verb); 'practice' (noun) vs 'practise' (verb); 'affect' (verb) vs 'effect' (noun); 'lie/lay' and 'rise/raise' differ in transitivity.

Reading comprehension: answer only from the passage, not from outside knowledge. For 'inference' questions choose the option that must follow from the text; for 'tone' questions match adjectives to the author's stance.

Cloze test: read the whole passage first, then predict the word before looking at options; check collocation (e.g. 'heavy rain', 'strong wind') and grammatical fit.

Para jumbles: find the opening sentence (no pronoun or connector referring back), then chain by pronouns, connectors (however, therefore) and repeated keywords.

Idioms and phrases: 'at the eleventh hour' = at the last moment; 'to bell the cat' = to take the risk; 'a wild goose chase' = a futile search; 'to burn the midnight oil' = to work late.

Percentage change: successive changes of a% and b% give a net change of a + b + ab/100. A price rise of r% requires consumption to fall by 100r/(100+r)% to keep expenditure constant.

Profit and loss: SP = CP x (100 + profit%)/100. If two articles are sold at the same price, one at a gain of x% and one at a loss of x%, the net result is always a loss of x^2/100 percent.

Simple and compound interest: SI = PRT/100; CI = P[(1 + R/100)^T - 1]. For two years the difference CI - SI = P(R/100)^2.

Time, speed and distance: distance = speed x time; for equal distances at speeds a and b, average speed = 2ab/(a + b). Relative speed adds for opposite directions and subtracts for the same direction.

Boats and streams: downstream speed = boat + stream, upstream = boat - stream; boat speed = (down + up)/2, stream speed = (down - up)/2.

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 to avoid fractions.

Ratio and mixtures: alligation gives the ratio of quantities as (mean - cheaper) : (dearer - mean). Repeated replacement of a vessel: final pure = initial x (1 - replaced/total)^n.

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

Permutation and combination: nPr = n!/(n-r)!; nCr = n!/[r!(n-r)!]. Probability = favourable outcomes / total equally likely outcomes.

Mensuration: area of circle = pi r^2, circumference = 2 pi r; volume of cylinder = pi r^2 h; sphere volume = (4/3) pi r^3, surface area = 4 pi r^2; cone volume = (1/3) pi r^2 h.