Coin puzzle: How do you make a circle of 6 coins from two rows in only 3 turns?

[mcv]

It’s surprisingly tough. I figured it out by reasoning backwards. It’s obvious what the last move is.

@roomwithaview

Roll the upper right coin clockwise around until it touches the two at that end of the bottom row, then pull the (now) center coin out to fill the gap in the edge and complete the circle - done!

You can’t pick it up, and being surrounded by 5 coins, it’s locked in. You can’t move that center coin anymore.