DeduceQuest

A wrong guess isn’t a miss — it’s a clue. Narrow a hidden code with Whittle, cross-reference with Tablo, read the grid with Nona, and test a hypothesis with Rulewright. Deducia frames every puzzle as predict → observe → explain.

Level 1

Solve a deduction puzzle

Four hands-on puzzle types. Predict, test, and reason — a hint appears only after a first try.

Whittle’s Code Breaker Crack a hidden colour code from exact/colour feedback pegs — Mastermind & Bulls-&-Cows. Tablo’s Logic Grid Cross off possibilities clue-by-clue until one ✓ is left per row and column. Nona’s Nonogram Fill grid cells purely from the row and column number clues to reveal a picture. Rulewright’s Guess the Rule Predict the hidden rule before the reveal, then reconcile — predict, observe, explain.

Choose a kit

Each kit is a short round of questions with hints when you need them. Your progress stays on this device.

Kit 1: Reading Feedback Code-Breaking · grades 4-5 · 25 questions Kit 2: Narrowing the Field Code-Breaking · grades 4-5 · 25 questions Kit 3: Bulls & Cows Code-Breaking · grades 4-5 · 25 questions Kit 4: Grid Basics Logic Grids · grades 4-5 · 25 questions Kit 5: Cross-Referencing Clues Logic Grids · grades 5-6 · 25 questions Kit 6: Nonogram Runs Nonograms · grades 5-6 · 25 questions Kit 7: Contradiction & Proof Reasoning · grades 5-6 · 25 questions Kit 8: Forming a Hypothesis Guess the Rule · grades 5-6 · 25 questions Kit 9: Testing a Hypothesis Guess the Rule · grades 6-7 · 25 questions Kit 10: Controlling Variables Reasoning · grades 6-7 · 25 questions Kit 11: Nonogram Intersections Nonograms · grades 6-7 · 25 questions Kit 12: Information & Best Guess Scientific Method · grades 6-7 · 25 questions Kit 13: Probabilistic Reasoning Reasoning · grades 7-8 · 25 questions Kit 14: Deductive vs Inductive Reasoning · grades 7-8 · 25 questions Kit 15: Constructing Explanations Reasoning · grades 7-8 · 25 questions Kit 16: Capstone — the Scientific Method Scientific Method · grades 7-8 · 25 questions

Sharpen up

A calm, self-paced speed round of concepts you've already mastered. Beat your own best — timer optional, no wrong-answer penalty. Nothing leaves this device.

DeduceQuest Sprint — a calm speed round → Quick recall of kits you've mastered. Self-paced by default; turn on a timer only if you want one.

Play together

Two ways to keep going — a same-device match with friends, or a trail through every kit. On-device only; nothing leaves this device.

Deduce Duel (pass-and-play) 2–4 players take turns on one device — same questions for everyone, highest first-try score wins. Code Breaker — Pass & Play (two players) One player secretly sets a colour code, the other cracks it from feedback pegs — then swap roles. Fewest guesses wins. Deduce Quest — follow the map → A progression trail through every kit. Clear each stop of real practice, then move on.

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.

Explore all the stories →

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