Question

How many cubes are needed to make the below given model?

• A. 19
• B. 34
• C. 37
• D. 42

Answer 1

The correct option is C 37

Number of cubes in the top layer = 1
Number of cubes in the second layer = 4
Number of cubes in the third layer = 4 + 2 + 1 = 7
Number of cubes in the fourth layer = 4 + 2 + 1 + 1 + 2 = 10
Number of cubes in the lowest layer = 4 + 4 + 2 + 2 + 3 = 15

Thus, the total number of cubes in the given solid is 1 + 4 + 7 + 10 + 15 = 37.