If you are on 104th Street, what block number are you on?

• A. 10400 S
• B. 11000 S
• C. 10400 N
• D. 1040 S

Answer: (A)

In Oklahoma City’s grid, each north-south street maps to a block number by taking the street’s number and adding two zeros, with a directional suffix showing which side of the central baseline you’re on. So 104th Street sits at the 10400 block. The suffix indicates direction relative to the baseline: South means you’re south of the central line, North would be north of it. Therefore 104th Street is at 10400 S.

The other options don’t fit because they point to a different direction or a different magnitude: 11000 S would be farther south on another street; 10400 N would be the north side of the baseline; 1040 S uses too few zeros and does not correspond to 104th Street.