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10. You have 59 cubic blocks. What is the minimum number that needs to be taken away in order to construct a solid cube with none left over?32271816

Question

You have 59 cubic blocks. What is the minimum number that needs to be taken away in order to construct a solid cube with none left over?

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Solution

1. Break Down the Problem

To construct a solid cube, the total number of cubic blocks must be a perfect cube, which can be expressed as n3 n^3 for some integer n n . We need to find the largest n3 n^3 that is less than or equal to 59 and then determine how many blocks need to be removed to achieve this.

2. Relevant Concepts

To identify the maximum cube:

  • Calculate n3 n^3 for different values of n n .
  • Start with n=1,2,3, n = 1, 2, 3, \ldots until n3 n^3 exceeds 59.

3. Analysis and Detail

  1. For n=1 n = 1 : 13=1 1^3 = 1
  2. For n=2 n = 2 : 23=8 2^3 = 8
  3. For n=3 n = 3 : 33=27 3^3 = 27
  4. For n=4 n = 4 : 43=64 4^3 = 64 (exceeds 59)

The largest perfect cube ≤ 59 is 33=27 3^3 = 27 . To find the number of blocks to remove: 5927=32 59 - 27 = 32

4. Verify and Summarize

The calculation indicates that removing 32 blocks will leave us with a perfect cube of 27 blocks.

Final Answer

To construct a solid cube with no blocks left over, a minimum of 32 blocks must be taken away.

This problem has been solved

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