Which block number is associated with 179th Street?

• A. 17900 S
• B. 17900 N
• C. 17000 S
• D. 1790 S

Answer: (A)

In this grid system, each street name corresponds to a hundred-block address: the street number becomes the block number with two extra zeros. So for 179th Street, the block is 17900. The S or N tells which side of the baseline the street sits relative to the central grid, with this case using South, giving 17900 S. The other options don’t fit: 17900 N would be on the north side, which isn’t the street’s position here; 17000 S would correspond to 170th Street; 1790 S isn’t formatted as a hundred-block address, so it doesn’t match how these blocks are labeled.