Logic puzzle generator
Filter by challenge type and difficulty. Every problem includes a hint, answer, and reusable lesson.
Generate a puzzleProblem-solving tools and puzzle generators
Use twenty-two free browser-based tools to generate challenges, test reasoning, map assumptions, analyze evidence, organize causes, or compare decisions.
Which problem-solving tool should you use?
Choose from the output you need: practice, a measurable problem brief, a weighted option comparison, or a method recommendation.
- Practice: generate a puzzle, riddle, or reasoning test.
- Frame: turn a vague issue into a measurable gap.
- Decide: compare feasible options with visible weights and scores.
Seven tools for practice and decisions
Each tool keeps its inputs, limits, and next step visible.
Reasoning test
A short, mixed assessment with immediate scoring and explanations for each question.
Take the testFree IQ practice test
A rotating 12-question set drawn from 100 visual problems, with answers held until the result.
Free IQ practice testDecision matrix
Weight criteria, score options, and see which assumptions have the greatest effect on the result.
Compare optionsProblem framer
Create a clear problem statement, evidence plan, constraint list, and smallest useful experiment.
Frame a problemRiddle generator
Pick a theme and difficulty, then reveal a progressive hint before checking the answer.
Generate a riddleMethod selector
Describe the shape of a problem and get a transparent recommendation for the method that fits it.
Choose a methodFocused calculators and worksheets
Use a single-purpose workbench when the question is defined and you need a transparent calculation or structured record.
Truth Table Generator for Two Statements
Build a truth table for two statements using AND, OR, XOR, implication, or equivalence, with every row explained. Use the truth table generator for two statements with your own inputs.
Probability Calculator for Two Independent Events
Calculate both, either, exactly one, or neither for two independent events and see the formula behind each result. Use the probability calculator for two independent events with your own inputs.
Permutation and Combination Calculator
Compare ordered permutations with unordered combinations for n objects chosen r at a time, with formulas and interpretation. Use the permutation and combination calculator with your own inputs.
Expected Value Calculator With Three Outcomes
Calculate probability-weighted value for up to three outcomes and check whether the entered probabilities form a complete model. Use the expected value calculator with three outcomes with your own inputs.
Five Whys Root Cause Worksheet
Build an evidence-aware Five Whys chain, record uncertainty at each step, and turn the final mechanism into a testable action. Use the five whys root cause worksheet with your own inputs.
Root Cause Category Map
Organize possible causes across people, process, tools, and environment before choosing evidence that can separate them. Use the root cause category map with your own inputs.
Urgent and Important Priority Matrix
Sort tasks by urgency and importance, then attach a concrete action to do, schedule, delegate, or remove each item. Use the urgent and important priority matrix with your own inputs.
Categorical Syllogism Pattern Checker
Check common categorical syllogism patterns and learn why a conclusion follows or fails from the stated premises. Use the categorical syllogism pattern checker with your own inputs.
Number Sequence Difference Analyzer
Inspect first differences, second differences, and ratios in a number sequence without pretending that one pattern is uniquely proven. Use the number sequence difference analyzer with your own inputs.
Two-Option Decision Tree Calculator
Compare two uncertain options using best and adverse outcomes, probabilities, expected values, and visible downside ranges. Use the two-option decision tree calculator with your own inputs.
Assumption Mapping Worksheet
Rank assumptions by importance and uncertainty, then identify which belief should be tested before a decision moves forward. Use the assumption mapping worksheet with your own inputs.
Competing Hypotheses Evidence Matrix
Compare two explanations against three observations and see which evidence supports, conflicts with, or does not separate them. Use the competing hypotheses evidence matrix with your own inputs.
Pareto Contribution Analyzer
Sort category totals, calculate cumulative contribution, and identify where a small number of categories account for most measured impact. Use the pareto contribution analyzer with your own inputs.
Pre-Mortem Risk Planner
Imagine a plan has failed, rank plausible failure mechanisms, and attach a preventive control or early warning to each major risk. Use the pre-mortem risk planner with your own inputs.
Incident Timeline Builder
Sort incident events chronologically, expose the largest unexplained time gap, and separate recorded facts from later causal claims. Use the incident timeline builder with your own inputs.
Tools should improve the decision, not decorate it.
Every tool shows its inputs, reasoning, and limitations. Your work stays in the browser unless a page clearly states otherwise.
Choose from the job you need to do
Start with the intended result, then use the smallest tool that produces it without hiding the reasoning.
Practice a reasoning skill
Use the logic puzzle generator, visual puzzle games, or free IQ practice test.
Frame and compare a real decision
Define the situation with the problem framing worksheet, then compare feasible options with the weighted decision matrix calculator.
Find the right method
Use the problem-solving method selector when the problem is clear but the next analytical step is not.