A certain building built up in the rectangular shape contains 10 apart...
Explanation:
Given Clues:
- The sum of four apartment numbers in 4th row is 28.
- The biggest apartment number in row 3 is in the central apartment of the floor.
- The 3rd apartment number from the left in the bottom row isn't 7.
- The sum of rightmost apartment numbers in the four rows put together is 11.
- The apartments numbered 0 and 5 are in different rows of this building.
- The number of the apartment at the top minus the number of leftmost apartment in row 2 is 4.
- The sum of leftmost apartment numbers in the four rows sum to 20.
Analysis:
To find the row with the least sum of all the apartments, we need to analyze the information provided in the clues. From the clues, we can deduce the following:
- The sum of the apartments in the 4th row is 28, which means each apartment in this row has a sum of 7.
- The biggest apartment number in row 3 is in the central apartment, which means the central apartment in row 3 is 9.
- The 3rd apartment number from the left in the bottom row isn't 7, so it must be either 0, 1, 2, 3, 4, 5, 6, 8, or 9.
- The sum of rightmost apartment numbers in the four rows put together is 11, indicating that the rightmost apartments in the rows must have a sum of 11.
- The apartments numbered 0 and 5 are in different rows, so they cannot be in the same row.
- The number of the apartment at the top minus the number of the leftmost apartment in row 2 is 4, suggesting that the top apartment is 9 and the leftmost apartment in row 2 is 5.
- The sum of leftmost apartment numbers in the four rows sum to 20.
Conclusion:
After analyzing the clues, we can determine that row 2 has the least sum of all the apartments because the sum of the leftmost apartments in all rows is 20, and the leftmost apartment in row 2 is 5. Therefore, the sum of all the apartments in row 2 is less than the sum of apartments in other rows.
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