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Question:

Initially cars numbered 1, 2, 3, and 4 arrive among which 1 and 4 are SUVs while 2 and 3 are compact cars. Car 1 then leaves, followed by the arrivals of car 5 (a compact car) and car 6 (an SUV). Car 4 then leaves. Then car 7 (an SUV) and car 8 (a compact car) arrive. At this moment, which among the following numbered car is parked next to car 3?

Explanation:

Initially cars numbered 1, 2, 3, and 4 arrive among which 1 and 4 are SUVs while 2 and 3 are compact cars.

∴ The configuration is

| 1 | 1 | 2 | 3 | 4 | 4 |

Here each cell represents a single parking slot.

Now, Car 1 leaves. The configuration will be:

| V | V | 2 | 3 | 4 | 4 |

Car 5 (a compact car) and car 6 (an SUV) arrive. The configuration will be:

| 5 | V | 2 | 3 | 4 | 4 | 6 | 6 |

Car 4 leaves. The configuration will be:

| 5 | V | 2 | 3 | V | V | 6 | 6 |

Car 7 (an SUV) and car 8 (a compact car) arrive. The configuration will be:

| 5 | 8 | 2 | 3 | 7 | 7 | 6 | 6 |

At this point cars that are parked next to car 3 are car 2 and car 7.

Hence, option (b).