4=10.

A little arithmetic. A lot of possibilities.

Make it
add up.

THE FOUR-NUMBER PUZZLE / 01

Four digits. One perfect ten.
Choose your numbers. We’ll find
the way to get there.

Let’s solve it

01 / Your four digits

Drag up or down, use the arrows, or type a digit.

02 / Allowed operations

The result

Ready to solve

Your equation goes here.

?.

All four digits. Every one used exactly once.

SIMPLE RULES. SATISFYING ANSWERS.

A small puzzle.
An elegant solution.

  1. Pick four digits.

    Any digit from 0 to 9. Repeats welcome. Use each one exactly once.

  2. Set your rules.

    Choose the operations. Keep parentheses on for more possibilities.

  3. Meet your ten.

    We try every order and grouping. If ten isn’t possible, see the closest result.