Logic Gates

How to play

The top row of lights is the target. Build the circuit until the row below it looks the same.

• The dots at the bottom are the inputs: a lit dot is 1, a dark one is 0.
• Tap an empty slot in the circuit, then tap a gate in the tray below.
• You can also drag a gate from the tray straight into the slot.
• Tap a gate you already placed to send it back to the tray.
• The tray holds exactly the gates you need, with a count on each one.

Tips

• An AND gate lights up only when both of its inputs are lit.
• An OR gate lights up when at least one input is lit.
• A NOT gate flips it: a dark input lights up, a lit input goes dark.
• An XOR gate lights up when its two inputs are different.
• The hint draws the missing gate inside one empty slot.