Tests & quizzes
Two different things here. Timed mock tests are sat like an exam — a clock, no feedback until you submit, then a score report. Quizzes mark each question the moment you answer it. No sign-up for either.
Timed mock tests
Full-length papers in the formats employers and admissions tests actually set. A clock runs, nothing is marked while you work, and the report at the end breaks your accuracy down by question type.
24 questions · 20 minPermit Practice Test: 24 Questions in 20 MinutesThe six areas every state's permit test covers — 20 minutes, section-by-section report.20 questions · 20 minLogical Reasoning Test Practice: 20 Questions, 20 Minutes20 arguments, 20 minutes, one full diagnostic report.15 questions · 15 minInductive Reasoning Test: 15 Questions, 15 MinutesFind the rule: 15 questions in 15 minutes.24 questions · 12 minInductive Reasoning Practice Test (Paper 2): 24 Figures in 12 MinutesPaper 2 — 24 figure questions across five rule dimensions, 12 minutes.20 questions · 15 minMechanical Reasoning Practice Test: 20 Questions in 15 Minutes20 gear, pulley, lever, ramp and hydraulic questions, timed at 15 minutes.20 questions · 20 minFood Safety Manager Practice Test: 20 Questions in 20 Minutes20 questions on temperatures, cooling, contamination and hygiene, timed at 20 minutes.18 questions · 20 minTEAS Science Practice Test: 18 Questions in 20 Minutes18 questions on anatomy, reasoning and method, timed at 20 minutes.20 questions · 20 minVerbal Reasoning Test: 20 Questions, 20 MinutesTrue, False or Cannot Say — 20 passages against the clock.20 questions · 15 minCritical Thinking Test: 20 Questions in 15 MinutesThe five-section thinking format employers test — 15 minutes, full report.20 questions · 20 minNumerical Reasoning Test Practice: 20 Questions in 20 MinutesPercentages, ratios, tables and rates — the employer maths format, timed.20 questions · 15 minWatson Glaser Practice Test: 20 Questions in 15 MinutesThe five-section law-firm screening format — original questions, timed.Untimed · browse by typeLogical reasoning questions, workedNot ready for the clock? The same 20 arguments grouped into six question types, each with a guide and an explanation you can open.Untimed · 5 types · LSAT formatLSAT practice questions, by typeTen original five-option samples across the five Logical Reasoning question types, each with a field guide and a link to its full 12-question quiz.Untimed · True/False/Cannot SayVerbal reasoning questions, workedThe twenty timed-paper questions opened up for study, in four sets that teach the True / False / Cannot Say judgment discipline.Untimed · 4 premise patternsSyllogism questions (12 problems)Two statements, one forced conclusion: twelve worked problems with the solving rule taught before each set.Untimed · 4 puzzle familiesAnalytical reasoning puzzles (12)Ordering, grouping, seating and deduction puzzles with step-by-step solutions — the four families reasoning papers draw from.Untimed · figures drawnAbstract reasoning test, workedShape sequences, 2×3 matrices and odd-one-out, with the figures drawn and the feature-checklist method explained.Untimed · figures drawnSpatial reasoning test, workedRotation versus mirror image, rotation amount, and cube nets — with rules that replace mental rotation.Employer screening · 9 workedCCAT practice test, worked50 questions in 15 minutes means 18 seconds each — the strategy that follows from the arithmetic, plus worked verbal, math and logic questions.Classics · 11 workedLogic puzzles, fully workedTruth-tellers and liars, the two-door riddle, wolf-goat-cabbage, the 3-and-5 jugs, and hat puzzles solved by silence — with the move that unlocks each family.
Spreadsheet formulas
Formulas that run, return a number, and are wrong — the failure mode that actually costs people hours. Every problem asks what a formula returns or why it broke, with the answer explained.
Excel · 8 worked problemsExcel formulas practiceWhy VLOOKUP returns #N/A when the value is right there, the missing argument that returns wrong numbers silently, dollar signs and drag-fill, and reading error values.Excel · 8 worked problemsSUMIF, COUNTIF & COUNTIFS practiceThe silent zero: argument order that differs between SUMIF and SUMIFS, counting between two dates, why COUNTIFS cannot do OR, and criteria ranges of different sizes.Excel · 5 worked problemsINDEX MATCH vs VLOOKUP vs XLOOKUPThe inserted column that silently breaks VLOOKUP, looking left, the MATCH argument that must be 0, and what XLOOKUP costs in compatibility.Excel · 5 worked problemsPower Query practiceThe failures that only appear on refresh: the absolute path that breaks on another machine, the Changed Type step that hard-codes column names, and joins that silently change your row count.Excel · 6 worked problemsExcel drop-down list practiceWhy validation silently disappears after someone pastes, why only sheet protection prevents it, making the source grow with a Table, and why INDIRECT breaks on names with spaces.Excel · 5 worked problemsDATEDIF practiceThe function Excel refuses to autocomplete: what the six unit codes mean, why reversed dates give #NUM!, and the documented defect that makes "md" return a negative number.
Interview preparation
Worked problems rather than a list of a hundred questions: each page groups the questions by what the interviewer is actually probing, then explains the answer and the follow-up that usually comes next.
Interview prep · worked answersPython interview questionsTypes and hashability, mutable defaults, closures, the GIL, generators — ten worked problems.Interview prep · worked answersSQL interview questionsQueries where the obvious answer is wrong: JOIN row-multiplication, NULL, HAVING, window functions.Interview prep · worked answersJavaScript interview questionsvar vs let, the four this-binding rules, event-loop ordering, and == coercion.Interview prep · worked answersSystem design interview questionsNo right answers — practise the judgement: requirements first, name the trade-off, scale in order.Interview prep · worked answersBehavioral interview questionsTwo real answers compared each time: what STAR is for and what each question measures.
Quick quizzes
Short, untimed, and marked as you go — every question gets a plain-English explanation the moment you answer it.
Road Signs Practice Test: 12 Questions That Work in Every StateShapes and colors are federal — this part of your permit test is the same in every state.GMAT Critical Reasoning Questions: 12 Practice Problems with AnswersAll eight GMAT CR question types in twelve business-flavored arguments.Logical Fallacy Quiz: Can You Spot the Flawed Argument?12 arguments — can you spot the trick behind each one?Cognitive Bias Quiz: Which Mental Traps Fool You?12 everyday moments — which mental trap fools you?Camera Shot Types Quiz: Can You Name the Shot?12 shots — can you name them like a director?Scrum Quiz: 12 Questions to Test Your Scrum Knowledge12 sprint-room scenarios — do you know what the Scrum Guide really says?Ethos, Pathos, Logos Quiz: Name the Appeal at Work10 ads and speeches — name the appeal doing the heavy liftingUsability Heuristics Quiz: Diagnose These 12 UI Fails12 broken interfaces — name the Nielsen heuristic each one violatesA/B Testing Quiz: Can You Dodge These 12 Experiment Traps?12 experiment scenes — can you spot what's broken in each one?Gestalt Principles Quiz: Can You Read These 10 UI Layouts?10 UI scenes — which gestalt principle is at work (or being broken)?Cognitive Bias Test: Find Your Decision Blind Spots12 scenarios — find the blind spots steering your decisionsProject Management Quiz: 15 Scenarios to Test How You'd Really Run a Project15 project scenarios — can you make the calls a real PM has to make?Deductive vs Inductive Reasoning: What's the Difference?Top-down or bottom-up? Call it right on 12 real arguments.Monty Hall Problem Quiz: Should You Switch Doors?The probability puzzle that humiliates smart peopleSurvivorship Bias Quiz: Can You See the Planes That Never Came Back?12 questions. Find the planes that never made it home.LSAT Logical Reasoning Flaw Questions: Free Practice Quiz12 LSAT-style flaw questions · 5 choices each · full explanationsAssumption Questions: LSAT & GMAT Practice Quiz (with the Negation Test)Find the load-bearing wall the argument never mentions.Strengthen & Weaken Questions: LSAT & GMAT Practice QuizFind the gap first. Then decide: patch it or pry it open.Method of Reasoning Questions: LSAT & GMAT Practice QuizDescribe the move. Do not grade it.Free Logical Reasoning Test: 12 Practice Questions with AnswersJudge only what the passage says. That one rule is most of the test.GRE Analyze an Argument Was Retired in 2023 — What to Practice InsteadThe essay is gone. The skill still gets tested.Correlation vs Causation QuizCorrelation whispers; causation has to prove itself.Necessary vs. Sufficient Conditions QuizHurdles are not guarantees. Arrows have directions.Behavioral Economics Quiz: Can You Beat the Biases?12 Nobel-level experiments. See how far you are from Homo economicus.Base Rate Fallacy Quiz: Can You Beat the Denominator?Positive ≠ sick, alert ≠ fraud — see if the denominator fools you.Python Output Quiz: Can You Predict What This Code Prints?12 snippets. See how many classic Python gotchas you can dodge.Typography Quiz: Do You Have a Designer's Eye for Type?12 questions. Do you have a designer's eye for type?
Guides that go with the papers
Not tests. These answer the questions that come up around a test: which credential you actually need, what your state decides, what a score means, and how one question type works in detail.
Pulley questions, worked one by oneEight diagrams with the rule that decides all of them: count the rope segments supporting the load, not the pulleys.ASVAB subtests, and which of ours matchAll ten sections with question counts and time limits, plus an honest map of the two we cover closely and the six we do not.Food handlers card: what your state decidesA handler card is not a manager certification. What varies by state and county, with each rule quoted from the statute that set it.Permit test: what your state decidesThe federal layer is the same everywhere; the numbers are not. The checklist of what to look up before test day.CCAT scores: what counts as goodWhy there is no universal pass mark, how percentile scoring works, and what employers actually set as a cut-off.