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Beginner1 qubitpar 1

Fair coin

Build a circuit whose measurement is a genuine 50/50 coin flip: half the shots read |0⟩, half read |1⟩.

Stuck on the concept? Read Superposition & Measurement.

Target
What you are aiming at100 %
|0⟩
|1⟩
Your circuit
What you are producing right now100 %
|0⟩
|1⟩
Gates
Single qubit
Two qubit
Three qubit
Other

Select a gate to see what it does, then tap a wire — or Tab to a wire and press Enter — to place it.

Circuit
Gates
0
Par
1
Pick a gate from the palette to start building.

Pick a gate, then tap a cell — or Tab into the grid and use the arrow keys and Enter — to place it.

Practice more like this

Generate a fresh target distribution drill at this difficulty. Every generated puzzle is verified solvable by execution before you see it — the generator runs its own solution through the same simulator and grader that will judge yours.