Numigma / Number deduction

One number.
Every clue counts.

Follow the clues. Find the only number that fits.
Choose how many pieces your puzzle needs.

One answer. No spare clues.Remove any clue and more than one answer remains.

Customize puzzle 3 clues · Easy

Build your puzzle

Your rules

How many clues?

2 3 4 5 6

Exactly this many. Each one must matter.

Mathematical difficulty

Everyday arithmetic, remainders, and digit sums.

From To

Clue themes

Difficulty filters the themes below. For the widest variety, leave them all on.

How to play

The secret is a whole number in the displayed range. Every clue describes it. Combine them until only one number fits, then check your answer.

Clue count sets the length; difficulty sets the mathematics. Hard and Extreme use distinct clue types. Small groups of clues must leave a wider field of candidates to work through. More clues do not automatically mean an easier puzzle.

Every published puzzle is checked across its entire range. Any subset missing a clue still has multiple possible answers.

The deduction

Preparing puzzle…

Find the secret number.

Your clues will appear here.

A little arithmetic. A little persistence. A single satisfying answer.