We looked at the sequence used to lay tiles in a pyramid in the last 'Just for fun' exercise.

Below is another variation to that pattern. This time the tiles are built up in a reverse pyramid, starting at the intersection of both centre lines and progressively working out in both directions.

The first 3 tiles are numbered in the order they're laid in. See if you can put the remaining tiles in the correct sequence, starting with number 4. Click on each tile in order to show its number.