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Question
How many cubes are needed to make this interesting model?

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Solution
95 cubes are needed to make this model.

Explanation:
5 cubes in 9 columns ,5 x 9 = 45
4 cubes in 7 columns, 4 x 7 = 28
3 cubes in 5 columns, 3 x 5 = 15
2 cubes in 3 columns, 2 x 3 = 6
1 cube in 1 column, 1 x 1 = 1
Total no of cubes = 95
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