Answer:
6
Explanation:
The first house number in Maple st. is 6. Each house number on Maple Street is six more than the house number to its left. The last house is in the 5th position, then its number is 6 + 6*4 = 30
The first house number in Oak st. is 4. Each house number on Oak Street is eight more than the house number to its left. The last house is in the 5th position, then its number is 4 + 8*4 = 36
The difference between their numbers is 36 - 30 = 6