Brain Twister

Option 1: The driver's surname is Sun, the co-driver's surname is Zhang, and the stoker's surname is Chen.

Because the passenger Chen lives in Tianjin and has the same surname as the co-pilot.

He lives in Beijing.

Therefore, the co-pilot is not surnamed Chen, excluding B and D.

Because one of the passengers is the neighbor of the co-pilot, who lives in the north.

Between Beijing and Tianjin.

So the neighbor of the co-pilot lives between Beijing and Tianjin.

Because the passenger Lao Zhang has 20 years of service and the neighbor of the co-pilot works.

The age is exactly three times that of the copilot. (20 is not divisible by 3)

So the neighbor of the co-pilot is not surnamed Zhang.

Because the passenger Lao Chen lives in Tianjin and the co-pilot lives in Beijing and

Between Tianjin.

Therefore, the neighbor of the co-pilot is not surnamed Chen.

Therefore, the neighbor of the co-pilot is surnamed Sun.

So Lao Sun lives between Beijing and Tianjin.

Because the passenger with the same surname as the co-pilot lives in Beijing, and the Chen family

I live in Tianjin and my grandson lives between Beijing and Tianjin.

So only Lao Zhang and the co-pilot have the same surname and live in Beijing.

Therefore, the co-pilot Zhang surname and E surname are excluded.

And the hardest part is here: hint 4: Lao Sun and the fireman on the locomotive are playing chess.

Please note that when passengers are mentioned in this question,

The word "passenger" always comes before "old *".

Such as "Passenger Lao Zhang ..." "Passenger Lao Chen ..."

However, tip 4 says "the old grandson on the locomotive", and there is something wrong with it.

We can think that Lao Sun is a locomotive worker.

In other words, the old man playing chess with the fireman is not a passenger, but one of the driver and the co-driver.

So there is already a surname Sun, so the stoker is not surnamed Sun.

Because the co-pilot surnamed Zhang.

That is, the stoker is neither surnamed Sun nor Zhang.

So the fireman's surname is Chen.

The driver surnamed Sun plays chess with the fireman, which can be explained as follows: the train has a transfer station, they play chess when stopping, or the co-driver plays chess when driving for the driver, or the bus plays chess after arriving at the station or before departure.

To sum up, the driver's surname is Sun, the co-driver's surname is Zhang, and the stoker's surname is Chen.