Banking | RBI Grade B
RBI Grade B sets 30 Quantitative Aptitude questions for 30 marks in the Phase I: Preliminary Examination, so it is worth planning your preparation around the topics below.
Speed decides this section. The arithmetic and data-interpretation sets are where the marks are, so the priority is a reliable method and quick calculation rather than exotic shortcuts. Lock down tables, squares and reciprocals, then drill data interpretation until reading the set is faster than solving it.
How much Quantitative Aptitude is worth in each RBI Grade B stage, from the official pattern.
| Stage | Questions | Marks | Time | Share |
|---|---|---|---|---|
| Phase I: Preliminary Examination | 30 | 30 | — | 15% |
Every topic in the official syllabus. The linked ones open a set of solved questions you can practise straight away.
Written to the RBI Grade B pattern, with the answer key and the method behind it — a look at how the section is actually set before you drill the full topic sets.
Mixtures and alligation · solved example
In 45 litres of a mixture, milk and water are in the ratio 4 : 1. How much water (in litres) must be added to make the ratio 3 : 2?
Solution
Milk = 36 L and water = 9 L. To make milk : water = 3 : 2, water must be 36 × 2/3 = 24 L, so 24 − 9 = 15 L are added.
Compound interest · solved example
What is the compound interest on Rs 8000 at 10% per annum for 2 years, compounded annually?
Solution
Over two years at 10%, the amount is 8000 x 1.1 x 1.1 = 9680, so the interest is 9680 - 8000 = 1680. Equivalently, the two-year rate is 10 + 10 + (10 x 10)/100 = 21%, and 21% of 8000 is 1680.
Percentage · solved example
In an election between two candidates, the winner secured 58% of the valid votes and won by 4800 votes. How many valid votes were polled?
Solution
The winner had 58% and the loser 42%, a gap of 16% of the valid votes. That 16% equals the winning margin of 4800, so the total is 4800 / 0.16 = 30000. Turn the margin into a percentage of the whole before dividing.
Data interpretation · solved example
What is the average number of diesel cars sold per month over the four months?
Solution
Diesel total is 80 + 100 + 60 + 120 = 360, so the average is 360 ÷ 4 = 90.
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Untimed drills with the method shown after every question — the step between learning a topic and sitting it under a clock.
Calculation speed
195 questions, instant feedback
Data interpretation
105 questions, instant feedback
Mensuration, mixtures and counting
87 questions, instant feedback
Number series
93 questions, instant feedback
Percentage, profit and averages
123 questions, instant feedback
Quadratic equations
69 questions, instant feedback
Interest, ratio and partnership
117 questions, instant feedback
Simplification and approximation
108 questions, instant feedback
Time, speed, distance and work
108 questions, instant feedback
Quantitative Aptitude shows up in every RBI Grade B mock test, in the same interface, with sectional locking and negative marking.
RBI Grade B 2026-27 cycle sets 30 Quantitative Aptitude questions for 30 marks in the Phase I: Preliminary Examination.
Yes. RBI Grade B deducts one fourth of a mark for each wrong answer, Quantitative Aptitude included, so unsure guesses cost you. One fourth of the marks assigned to a question is deducted for a wrong answer.
The RBI Grade B syllabus lists Data interpretation: tables, caselets, bar, line and pie, Data sufficiency, Number series, Quadratic equations and inequalities, Percentage, ratio and proportion, Profit, loss and discount and more. Weight your revision towards the ones you are weakest on and confirm the emphasis against the paper analysis for recent cycles.
Every Quantitative Aptitude question on this site is free and written to the exam pattern. Use the topic drills for instant-feedback practice, the daily quiz to keep the section warm, and the RBI Grade B mock tests to sit it under a real clock with negative marking.