Funcle

Every function is built from the same skeleton:

(A/B) · f(x) ± (C/D) · g(x) ± E

The graph is drawn with the real coefficients. Find A, B, C, D, E in 4 attempts.

A, B, C, D are 1–9, E is 0–9.
The fractions A/B and C/D are always irreducible — so 2/4 never happens.
Type with your keyboard or the on-screen pad. Backspace deletes, Enter validates.
Drag on the graph to zoom, double-click to reset.
Five difficulty levels, one function each, refreshed daily.

Right value in the right slot

That value appears, but somewhere else

That value is not in the solution

Duplicates are counted exactly like Wordle: each solution digit can only be matched once.

Function graph