Question

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. After the third car, there are three scooters, and so on. Work out the
number of scooters in the second half of the row? (Use equations)

Answer 1

Answer:

15

Step-by-step explanation:

If there is 1 car, there is 1 scooter

If there are 2 cars, there are (1 + 2 = 3) scooters

If there are 3 cars, there are (1 + 2 + 3 = 6) scooters

If there are 'n' cars, there are (1 + 2 + 3 ... n = n(n+1)/2) scooters

In that way,

for 7 cars there will be 28 scooters which gives a total of 35 and the last vehicle will be a car.

So, totally there are a total of 8 cars and 28 scooters.

In the first half we will get 13 scooters by calculating or by data representation.

finally the no of scooters in second half is

28-13=15