DiscreteQuest Play — discrete math in your browser — Spark & Anvil

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Graph Explorer Trace the Seven Bridges of Königsberg — walk nodes and edges to see what a path can and cannot do.

Counting Lab Work out permutations, combinations, and the pigeonhole principle — count without listing.

Mixed Practice A short round across the kits you have played — spaced so it sticks.

Discrete Duel Play a friend on one device — same questions, highest first-try score wins.

All activities

Explore

Graph Explorer Trace the Seven Bridges of Königsberg — walk nodes and edges and discover why some walks are impossible. Walk the bridges Try to cross all seven bridges of old Königsberg exactly once, see why nobody can, then change the town until a walk works. Cube Cover Slide a cube to cover every tile once and reach the flag — a Hamiltonian path, the graph-theory twin of the Euler walks in the Graph Explorer.

Count

Counting Lab Permutations, combinations, and the pigeonhole principle — count the possibilities without listing them all. Run It 100 Times In a room of 23 people, two share a birthday about half the time. Guess how much the checks scatter, then run them and count.

Prove

Tile Proofs Build the staircase 1 + 2 + … + n, then fit a second copy beside it: the rectangle proves the sum without a word. Truth-Table Lab Propositional logic made visible — predict whether a formula (AND, OR, NOT, if-then) is always true, always false, or sometimes true, then see the whole truth table. De Morgan, the contrapositive, and the if-then surprise.

Play together

Teach the Cast Teach a discrete-math idea to a cast member still learning it — teaching makes it stick. Discrete Duel 2–4 players take turns on one device — same questions, highest first-try score wins.

More

Mixed Practice A short round across the kits you have played — brought back to make it stick. Trick Questions Brain-teasers with a twist — spot why the obvious answer is a trap. Adventure Map A progression trail through every kit — clear each stop of real practice, then move on. Progress Your levels, days active, and how each track is coming along — saved on this device. Progress report For grown-ups — a private on-device snapshot mapped to the skill areas. Export a CSV or print.

Concept Kits — 16 kits of discrete math

From the foundations up through counting, logic & graphs, recursion, and number theory — a short round with a hint whenever you get stuck. Progress stays on this device.

Kit 1: Sets and Sorting Foundations · 4-5 · 25 questions Kit 2: Counting and Patterns Counting & Combinatorics · 4-5 · 25 questions Kit 3: Logic and Truth Tables Logic & Graphs · 5-6 · 25 questions Kit 4: Graph Theory Basics Logic & Graphs · 5-6 · 25 questions Kit 5: Combinatorics and Probability Counting & Combinatorics · 6-7 · 25 questions Kit 6: Recursion and Sequences Recursion, Number Theory & Algorithms · 6-7 · 25 questions Kit 7: Number Theory and Cryptography Logic & Graphs · 7-8 · 25 questions Kit 8: Algorithm Design and Complexity Recursion, Number Theory & Algorithms · 7-8 · 25 questions Kit 9: Elements & Principles Deep Dive Connections & Real-World · 5-6 · 25 questions Kit 10: Cultural & Historical Context Connections & Real-World · 6-7 · 25 questions Kit 11: Creative Process & Critique Connections & Real-World · 6-7 · 25 questions Kit 12: Professional Practice & Careers Connections & Real-World · 7-8 · 25 questions Kit 13: Cross-Topic Connections Connections & Real-World · 5-6 · 25 questions Kit 14: Real-World Applications Connections & Real-World · 6-7 · 25 questions Kit 15: Misconceptions & Reasoning Connections & Real-World · 6-7 · 25 questions Kit 16: Advanced Synthesis Connections & Real-World · 7-8 · 25 questions

More ways to play

Quiz Arena Discrete Run Run 100×

Same idea, another world

Something you practice here shows up somewhere else too — that's real learning that travels.

Multiplying the number of choices at each step is exactly how you count the total outcomes behind a probability. The shared idea: counting the outcomes — the fundamental counting principle (multiply the choices at each step) is exactly how you count all the outcomes to get a probability Try ChanceForge →

DiscreteQuest mascot

Meet the cast — the characters who teach this

Each one stands for an idea you’ll practice. Tap a character to read their illustrated story and hear their audio drama.

Ensemble stories — the cast together

Explore all the stories →

What next? Pick a door

Chosen from what this app is about. What you open is remembered on this device only.

📚 Books for DiscreteQuest

Read the story, print a workbook, or color the cast — free PDFs to read offline or print at home.

Browse all books →

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