Drill types
Aptitude questions with answers — all 21 drills, and exactly how long you get
These are aptitude questions with answers you solve against a clock rather than read. Twenty-one drill kinds cover the quantitative-aptitude section of IBPS, SBI, SSC and railway papers, plus five vedic-maths techniques that make the arithmetic fast enough to finish. Every question is generated fresh and its answer computed from the printed numbers, so nothing repeats and every round ends in a worked solution.
ComputePrep serves one drill kind a day at three difficulties, rotating through all 21 kinds below — and you can drill any of them on demand, as often as you like. Every time limit is published here: nothing about the clock is a surprise, and the limit you see in the app is the deadline our server enforces.
Two paths, one daily. The Vedic path is the technique curriculum — five sutra-based shortcuts that make a 15-second answer physically possible. The Exam path is the paper itself — sixteen drills that map to marks on IBPS, SBI, SSC and railway prelims. The rotation interleaves both, so a week gives you technique and application rather than one of them seven times.
Every drill name below is a link. Tap one and it opens on that kind straight away — no waiting for it to come round in the rotation.
Practise a topic in depth
These pages carry real worked examples, the method, and the mistakes the wrong options are built from — then hand you the live timed drill for that topic.
- Profit and loss questions — cost price, selling price, markup and successive discounts.
- Time and work questions — the LCM-units method, efficiency ratios, pipes and leaks.
- Average questions — the total-first method and the change-in-average pattern.
- Time speed and distance questions — relative speed, trains, boats and streams.
- Percentage questions for bank exams — the fraction table that speeds up half the section.
- Data interpretation questions — read the table and its units before computing; let the option spread set the precision.
- Caselet DI questions — the data is a paragraph; build the table first, then answer all five from it.
- Simplification questions — BODMAS in the real order: 48 ÷ 6 × 2 is 16, not 4.
- Simple and compound interest questions — the two-year gap is always P × R² ÷ 10000.
- Quadratic equation questions — compare every root against every root, and answer "no relation" when they disagree.
- Mensuration questions — curved versus total surface area, and scaling by k² / k³ instead of recomputing.
- Boat and stream questions — the boat's speed is the average of the two speeds, never of the two times.
- Permutation and combination questions — one swap test decides which formula applies.
- Probability questions — favourable over total, counted consistently; "at least one" is 1 − P(none).
- Square root and cube root questions — read the root off the last digit instead of dividing.
- Fast calculation questions — round and adjust, split the multiplier, work left to right.
The Vedic techniques, one page each
The sutra-based shortcuts that make a 15-second answer possible. Each page works the method step by step, then hands you the live timed drill for it.
- Vedic maths multiplication tricks — Urdhva-Tiryagbhyam, the crosswise method that works on any pair, plus the ×11 shortcut.
- How to square numbers fast — Ekadhikena for numbers ending in 5, Yavadunam for numbers near a base.
- Nikhilam multiplication — two numbers near a base, in two steps: 97 × 96 = 9312.
- Units adding to 10 — same leading part, units summing to ten: 43 × 47 = 2021 in one step.
- Difference of squares — equally spaced about a midpoint: 47 × 53 = 50² − 3² = 2491.
Looking for number series? That one lives on our reasoning product — number series questions on Deduce. It is a pattern-recognition kind rather than a calculation kind, so it is drilled there, not here.
The Vedic path — 5 technique drills
These are the shortcuts the exam never teaches you. Each walkthrough shows the sutra steps, never long multiplication — the method is the product. Full worked examples of all five →
| Drill | What it trains | Easy | Medium | Hard |
|---|---|---|---|---|
| Vedic Squaring | Squaring by Ekadhikena (numbers ending in 5: 75² = 5625) and Yavadunam (numbers near a base: 88² = 7744). | 15s | 20s | 30s |
| Complementary Products | Antyayordashake — same leading part, units adding to 10: 43 × 47 = 2021, in one step. | 15s | 20s | 30s |
| Difference of Squares | Sankalana-Vyavakalanabhyam — multiply through the midpoint: 47 × 53 = 50² − 3² = 2491. | 15s | 20s | 30s |
| Nikhilam | Multiplying near a base using deficits: 97 × 96 = 9312 in two steps, no paper. | 20s | 25s | 35s |
| Crosswise Multiplication | Urdhva-Tiryagbhyam, the general vedic method that multiplies any two numbers in one line — with × 11 as its easy variant. | 20s | 30s | 45s |
The Exam path — 16 paper drills
These are the question types a prelims quant section actually asks. Each is a separate drill kind on purpose: the app times you per kind, so "you are slowest at time & work" is a thing you can find out and fix, rather than a vague sense that quant is hard.
Calculation speed
| Drill | What it trains | Easy | Medium | Hard |
|---|---|---|---|---|
| Speed Arithmetic | Mixed mental arithmetic on a short clock — the warm-up that everything else sits on. | 15s | 20s | 30s |
| Percentages | Percentage values, increases and decreases done as fractions you already know, not long multiplication. | 20s | 30s | 40s |
| Squares, Cubes & Roots | The recall table every fast solver has, plus deriving what you have not memorised. | 15s | 20s | 30s |
| Simplification (BODMAS) | Order of operations under time pressure. The left-to-right trap is always planted among the options. | 20s | 30s | 45s |
| Averages | Means, and the change-in-average pattern where the classic error is adding the change without dividing it. | 20s | 30s | 40s |
Question types the paper asks
| Drill | What it trains | Easy | Medium | Hard |
|---|---|---|---|---|
| Quadratic Comparison | The banking "quadratic equations" set: solve for x and y, then pick the correct relation (including "no relation can be established"). | 30s | 40s | 50s |
| Table DI | Data interpretation from a table — the commonest DI surface in banking prelims. | 40s | 50s | 65s |
| Caselet DI | Data interpretation from a written caselet, where half the work is extracting the numbers. | 40s | 50s | 65s |
| Profit & Loss | Cost price, selling price, markup and discount — including successive discounts. | 35s | 45s | 60s |
| Simple & Compound Interest | SI and CI, and the difference-between-the-two question that follows from them. | 40s | 50s | 65s |
| Time & Work | Work rates, combined work and partial work — the efficiency method rather than LCM guessing. | 45s | 55s | 70s |
| Time, Speed & Distance | Speed, distance, relative speed and the train problems built on them. | 40s | 50s | 65s |
| Mensuration | Area, perimeter and volume of the standard figures, without reaching for a formula sheet. | 35s | 45s | 60s |
| Boats & Streams | Upstream and downstream speeds — the pattern that is trivial once seen and slow every time it is not. | 40s | 50s | 65s |
| Permutation & Combination | Arrangements and selections. The nPr-for-nCr mix-up is always among the options. | 45s | 55s | 70s |
| Probability | Probability with exact fraction answers — no decimal rounding to hide behind. | 45s | 55s | 70s |
How the questions are made
Every drill is generated fresh and verified by machine before it is served — the answer is computed from the printed expression, not written by hand, and the counting kinds are re-checked by enumeration in our test suite. That is why the questions do not repeat and cannot be memorised, and why we can publish a time limit and mean it.
The wrong options are built from the classic careless errors for that specific kind. Picking one is diagnostic: it tells you which habit is costing you marks.
Play today's drill →Looking for reasoning, not quant? Our sister product Deduce covers the logical-reasoning section with 27 reasoning puzzle types — seating arrangement, floor puzzles, syllogism, data sufficiency, coding-decoding, blood relations and more, each proven to have exactly one solution. Quant speed here, reasoning next door.