In the movie Iron Man, Pepper Potts asks Tony about his social security number to which he replies just 5 and wittily skips the question. In another scene, his array of cars has been shown one of which mentions the number plate as "STARK 5" (there are others as well).

So, on a blind note, is there any significance of Tony's interest with no. 5 in particular other than the fact that he's born in May?

  • 1
    When you say "(there are others as well)" do you mean there are other cars or number plates (as the placement of that text implies), or do you mean there are other examples of the number 5 being used? Two examples isn't really proof of an "obsession". The bit at the end about the entry code seems like a separate (though honestly I'd say poor) question, though is there any particular reason you think there might be something to it other than a randomly selected number? Oct 19, 2015 at 13:21
  • 2
    Were the other cars labelled "STARK-1", "STARK-2", etc?
    – Valorum
    Oct 19, 2015 at 13:38
  • BTS shot from Iron Man 3 showing a Stark 17 license plate. Stark 33 from Avengers. He's just numbering the cars.
    – phantom42
    Oct 19, 2015 at 13:46
  • I've seen numerous references to Tony's favourite number being eleven, not number five. It's the number of his racing car, for example.
    – Valorum
    Oct 19, 2015 at 13:50
  • 3
    @Daft - Pepper Potts has five letters in her surname, coincidence?
    – Valorum
    Oct 19, 2015 at 14:00

1 Answer 1


There is no obsession shown with the number 5.

Tony is clearly just numbering his cars.

Stark 11 From Iron Man 2

Stark 17
From Iron Man 3

Stark 33
From The Avengers

Stark 65 From Avengers: Age of Ultron

  • So the question OP should have asked is why is Iron Man obsessed with Audis?? Is it because after 4 the number 5 comes? (there are 4 rings in Audis logo)
    – Cherubel
    Oct 19, 2015 at 14:05
  • 1
    @Cherubel Four rings in Audi logo? Audi CEO now confirmed to be the actual Mandarin.
    – CBredlow
    Oct 19, 2015 at 21:22
  • Half life 4 confirmed?
    – Valorum
    Oct 20, 2015 at 11:19

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