Count the number of cubes in the given figure.

In the figure, there are 9 columns containing 5 cubes each, 7 columns containing 4 cubes each, 5 columns containing 3 cubes each and 1 column containing 1 cube.

$\therefore$Total number of cubes = (9 x 5) + (7 x 4) + (5 x 3) + (1 x 1) = 89