01 / Tiny switches
Meet the bits
A bit is a switch: off is 0, on is 1. Four switches have place values 8, 4, 2, 1, so they represent numbers from 0 to 15. The rightmost switch is bit 0. Use the A and B controls in the circuit editor. The result is computed by the gates and wires you can edit.
Your mini mission
Make A = 9: turn on the 8 and 1 switches. Make B = 3: turn on 2 and 1.