Step 1: Here you see two groups of coins. In the left group, the yellow coins are placed in the top row. And in the right group–placed diagonally. The task is to rearrange the coins in the left group to match the ones on the right. Easy, you say? Not so fast. Coins can be moved only horizontally or vertically–and always TWO at a time. Try solving in the least number of steps.
Step 2: Now check your solution. Here’s the first move.
Step 3: Second.
Step 5: And fourth move.
Step 6: And the coins are placed as they should be! How many moves did you make?