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IBPS RRB Quantitative Aptitude (Numerical Ability) Flashcards
50 question-and-answer cards covering Quantitative Aptitude (Numerical Ability) as it is examined in IBPS RRB. 24 of them are printed below, taken from across the deck — no signup, no paywall on the preview.
24 sample cards from the Quantitative Aptitude (Numerical Ability) deck
Sampled from the end of the deck, so these are different cards from the ones shown on the syllabus page.
What is the formula for the average of n numbers?
Average = (Sum of all observations)/(Number of observations).
State the Alligation rule for mixing two ingredients.
(Quantity of cheaper)/(Quantity of dearer) = (CP of dearer − Mean price)/(Mean price − CP of cheaper).
What are the basic conversions for speed: km/hr to m/s and m/s to km/hr?
km/hr to m/s: multiply by 5/18. m/s to km/hr: multiply by 18/5.
State the fundamental relation between speed, distance, and time.
Speed = Distance/Time; Distance = Speed × Time; Time = Distance/Speed.
What is the average speed for equal distances covered at speeds x and y?
Average speed = 2xy/(x + y) (harmonic mean), not the arithmetic mean.
For two trains crossing each other, what relative speed is used in same vs opposite directions?
Opposite directions: add speeds (s1 + s2). Same direction: subtract speeds (s1 − s2). Total distance = sum of lengths.
If A does a work in 'a' days and B in 'b' days, how long together?
Together time = ab/(a + b) days; combined one-day work = 1/a + 1/b.
In Pipes and Cisterns, how are inlet and outlet pipes treated?
Inlet (filling) pipes add to the rate (+1/x); outlet (emptying) pipes subtract (−1/y). Net rate determines fill/empty time.
What is the first step when interpreting a tabular data set in DI?
Read the title, row and column headers, and units carefully to understand what each cell represents before computing totals, averages, or ratios.
In a multiple bar graph, what does each set of grouped bars represent?
Each group represents one category along the x-axis, and the bars within a group represent different sub-series/years compared on the same scale.
What does a line graph best illustrate in DI?
Trends and changes over time or across a continuous variable; the slope between points shows the rate of increase or decrease.
In a pie chart, how do you convert a sector's degree measure to its value?
Value = (Sector angle/360) × Total; or if percentages are given, Value = Percentage × Total. Each 1% equals 3.6 degrees.
What characterizes a Caselet (paragraph-based) DI?
Data is presented as text within a paragraph rather than a table/graph; the solver must extract figures and often set up equations or a table to answer.
What is the strategy for Missing Data Interpretation problems?
Use given totals, percentages, ratios, or relationships stated in the set to back-calculate the blank values before answering the questions.
What is a Combined/Mixed graph in DI?
A single chart presenting two or more data types together (e.g. bars with an overlaid line, or a table plus a pie chart) requiring data from both to answer.
What is the standard form of a quadratic equation and the formula for its roots?
ax² + bx + c = 0; roots x = [−b ± √(b² − 4ac)]/(2a).
For roots of ax² + bx + c = 0, what are the sum and product of roots?
Sum of roots = −b/a; Product of roots = c/a.
How does the discriminant D = b² − 4ac determine the nature of roots?
D > 0: two distinct real roots; D = 0: two equal real roots; D < 0: no real roots (complex/imaginary).
State the formulas for permutations nPr and combinations nCr.
nPr = n!/(n−r)! (order matters); nCr = n!/[r!(n−r)!] (order does not matter).
What is the basic probability formula, and the range of probability values?
P(event) = (favorable outcomes)/(total outcomes). Probability ranges from 0 (impossible) to 1 (certain).
State the addition rule of probability for two events A and B.
P(A or B) = P(A) + P(B) − P(A and B). For mutually exclusive events, P(A and B) = 0.
Give the area and perimeter/circumference formulas for a rectangle and a circle.
Rectangle: Area = l×b, Perimeter = 2(l+b). Circle: Area = πr², Circumference = 2πr.
State the volume formulas for a cube, cylinder, and sphere.
Cube = a³; Cylinder = πr²h; Sphere = (4/3)πr³.
In Data Sufficiency, how do you evaluate the standard two-statement format?
Check if Statement I alone is sufficient, then if II alone is sufficient, then both together; answer with the minimal set that uniquely answers the question without actually solving fully.
What this deck covers
The Quantitative Aptitude (Numerical Ability) deck follows the IBPS RRB Quantitative Aptitude (Numerical Ability) syllabus — 4 chapters and 24 topics — so questions land on material that is genuinely examinable rather than trivia around it. That works out to roughly 12.5 cards per chapter.
Answers are written to be recallable, not just readable — averaging about 102 characters, which is long enough to carry the reasoning and short enough to say out loud.
A deck like this earns its keep on the second and third pass. Read the syllabus first so you know the shape of the subject, then use the cards to find the specific facts that have not stuck.
Quantitative Aptitude (Numerical Ability) flashcards FAQ
How many Quantitative Aptitude (Numerical Ability) flashcards are in this IBPS RRB deck?
50 cards. This page previews 24 of them, sampled evenly across the deck so you can judge the difficulty before installing anything.
Are these IBPS RRB flashcards free?
Yes. The preview here is free to read with no signup, and the full 50-card deck is free inside the Examius app.
What do the Quantitative Aptitude (Numerical Ability) cards cover?
They follow the IBPS RRB Quantitative Aptitude (Numerical Ability) syllabus — 4 chapters and 24 topics — so the questions track what is actually examinable.
How should I use these flashcards?
Read the syllabus first so you know the shape of the subject, then drill the deck. Examius schedules each card with spaced repetition, so cards you keep missing come back sooner and ones you know drift further apart.