How are cars classified if they DNF simultaneously?

[woohoo]

Well, the “countdown” rule would come into play here, I think.
If both drivers are equal on wins, then the number of second places counts. if they are equal, the number of third places and so on.
So in this a finish (even outside points) would count for more than a DNF.
So I suppose, in this case Hamilton and Verstappen would have to have the exact number wins, second, third places and so on, till the difference comes down to finishes for this situation to play out.

[pob]

They went into the grand prix tied on points. Reptayn's point is Hamilton would have ended on more points as he would have been classified higher (and in the points) as he was ahead the last time they went over the finish line if they both dnf'ed on the final lap.

[woohoo]

Yes, but in the case of drivers being equal on points, the number of highest placed positions trumps.
So, as Verstappen has more wins (9) that Hamilton (8), the count back rule would come into effect.

[dans79]

Yes, but in the case of drivers being equal on points, the number of highest placed positions trumps.
So, as Verstappen has more wins (9) that Hamilton (8), the count back rule would come into effect.

You're still missing his point. If Lewis and Max crashed out on the last lap, they would have finished 10th and 11th because only 11 cars were on the lead lap, that means one of them would have have gotten a point and the other wouldn't have.

The count back only applies if drivers are tied after the last race.

with that being said, Even if Lewis finished 10th, they would have still tied, because Max took the the fastest lap point on lap 39.

[pob]

... but then Verstappen wouldn't have been awarded the point for that if he was classified outside the top 10.

[dans79]

... but then Verstappen wouldn't have been awarded the point for that if he was classified outside the top 10.

Ops, I forgot about that part!

[woohoo]

Yes, but in the case of drivers being equal on points, the number of highest placed positions trumps.
So, as Verstappen has more wins (9) that Hamilton (8), the count back rule would come into effect.

You're still missing his point. If Lewis and Max crashed out on the last lap, they would have finished 10th and 11th because only 11 cars were on the lead lap, that means one of them would have have gotten a point and the other wouldn't have.

The count back only applies if drivers are tied after the last race.

with that being said, Even if Lewis finished 10th, they would have still tied, because Max took the the fastest lap point on lap 39.

I think I am just bad at explaining.
If both drivers had been at the same points and equal number of wins, second places, third places and so on going into (and out!) of a race, the count back rule would come into effect and then the one who is further up the road at the time of retirement would be classified higher.
Example would be how Häkkinen was classified behind Salo in the 1996 Monaco race. (both had retired in the same collision, so were classified in the order in which they retired.)
https://en.wikipedia.org/wiki/1996_Monaco_Grand_Prix