Work out the size of a grid required to display n tiles whilst keeping some sort of visual balance. The physical dimensions of the display region and tiles are unimportant.

gistfile1.txt

    @Test
    public void nTilesRequireGridToDisplay() {
        assertThat(tiles(1), requiresGridOf(1, 1));
        assertThat(tiles(2), requiresGridOf(1, 2));
        assertThat(tiles(3), requiresGridOf(2, 3));
        assertThat(tiles(4), requiresGridOf(2, 4));
        assertThat(tiles(5), requiresGridOf(2, 3));
        assertThat(tiles(6), requiresGridOf(2, 3));
        assertThat(tiles(7), requiresGridOf(3, 3));
        assertThat(tiles(8), requiresGridOf(3, 3));
        assertThat(tiles(9), requiresGridOf(3, 3));
        assertThat(tiles(10), requiresGridOf(3, 4));
        assertThat(tiles(11), requiresGridOf(3, 4));
        assertThat(tiles(12), requiresGridOf(3, 4));
        assertThat(tiles(13), requiresGridOf(4, 4));
        assertThat(tiles(14), requiresGridOf(4, 4));
        assertThat(tiles(15), requiresGridOf(4, 4));
        assertThat(tiles(16), requiresGridOf(4, 4));
    }

mistake in the above;

    assertThat(tiles(3), requiresGridOf(2, 2));
    assertThat(tiles(4), requiresGridOf(2, 2));