The Basic Plot
- Solve the inner 3x3x3 edges.
- Solve the inner 3x3x3 corners.
- Solve the outer edges.
- Solve the outer corners.
Step 1: Solve Inner 3x3x3 Edges
The key thing with this puzzle is to focus first on the 3x3x3 cube located in the center of the cuboid. Forget about the top and bottom faces, and just pretend you're solving a 3x3x3.
To start it off, solve the edges.
Step 2: Solve Inner 3x3x3 Corners
Next, solve the corners, as you would on a standard cube. The only tricky part is seeing which corner goes where, since some corners have only two colors on them.
Here's what to do when you have three inner corners to go.
Step 3: Solve Outer EdgesFrom now on, forget about the inner 3x3x3, which is solved, and approach the remaining pieces as the upper and lower layers on a 3x3x4.
The outer edges are solved in this way.
Step 4: Solve Outer Corners
Finally, complete the solve by placing the outer corners, again, just as you would for a 3x3x4 cuboid.
And that's it. Your 3x3x5 Cuboid is now solved. I trust this site has been helpful. If you have any questions or want some clarifications, please use the comments to do so.