Thirty-six vehicles are parked in a parking lot in a single row. After the first car, there is one scooter. After the second car, there are two scooters, and so on. Work out the number of scooters in the second half of the row.
A
10
B
12
C
15
D
17
Correct Option:
C
Explanation
The arrangement grows as: car + 1 scooter, car + 2 scooters, car + 3 scooters, and so on. The first 35 positions contain seven such groups, and position 36 begins the next car. In positions 19-36, the second half, there are only 3 cars. Therefore, 18 - 3 = 15 scooters.
