Something for your mind

Five rounds, one attempt each: a midpoint, a centre, three seconds, a circle, ten seconds. You estimate, the page measures, the gap is the score. The pointing rounds need a mouse, touch or stylus.

Rest your pointer on the brass pad, then follow the wire to the ring without touching the edges of the channel. Three lives. Touches cost three seconds each. On a phone, trace with your finger and the channel is a little kinder. This one needs a mouse, touch or stylus.

Arrow keys or WASD. On a phone, swipe anywhere on the board. Walls are walls.

Sixteen digits, typed exactly as shown. The clock starts on your first keystroke and stops on the sixteenth. Only clean runs make the record, because speed without accuracy is noise.

Press a cell and it flips with its four neighbours. Put every light out. A new board is set each day, the same board for everyone.

Three reels roll at different speeds. Stop them one at a time, left to right, and land the target reading. Nearest digit counts against you.