Question

Three views of a stack of sugar cubes are shown below. What is the MINIMUM number of cubes that are required to produce this stack?

• A. 25
• B. 28
• C. 31
• D. 35

Hint:

Start with the $16$ cubes forced by the complete top view. Then overlap equal front-view and side-view peak requirements at common grid cells so that each extra vertical cube serves both silhouettes.

Answer 1

The Correct Option is A

Step 1: Honour all three views.
Place cubes only where the top, front and side silhouettes all demand one.
Step 2: Count the minimum.
Layer-by-layer this minimal stack needs 25 cubes.
\[ \boxed{25} \]