Counting unit cubes in a larger cube: How many 10 cm × 10 cm × 10 cm cubes fit in a cube of edge 1 m?

Difficulty: Easy

Correct Answer: 1000

Explanation:


Introduction / Context:
Partitioning a big cube into equal smaller cubes reduces to counting how many fit along each edge, then cubing that count (since the arrangement is 3D).



Given Data / Assumptions:

  • Big cube edge = 1 m = 100 cm
  • Small cube edge = 10 cm
  • Number per edge = 100 / 10 = 10


Concept / Approach:
Total small cubes = (number per edge)^3 = 10^3 = 1000.



Step-by-Step Solution:
Along each edge: 10 cubesTotal: 10 * 10 * 10 = 1000



Verification / Alternative check:
Volume ratio method: (100^3) / (10^3) = 1,000,000 / 1000 = 1000, consistent.



Why Other Options Are Wrong:
10 and 100 count 1D/2D tilings, not 3D; 10000 is 10,000 which is 10^4, too large; 500 is arbitrary.



Common Pitfalls:
Forgetting the third dimension; mixing cm with m without converting; dividing volumes but forgetting cubes must tile exactly (they do here).



Final Answer:
1000

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