Cube

Deliberate mistake: Leaven spends too much time thinking about if 645 and 372 are prime numbers to be believable. But she knows the factors of 649 and the result of 26 to the power of 3 almost immediately. Plus anyone with any maths knowledge whatsoever would know that any even number (or one divisible by 5) can't be prime, so 645 and 372 could be dismissed without even thinking about it.

Continuity mistake: In the opening, the camera zooms in on an eye that is a very light greyish blue. The camera then cuts to a man lying on the floor. The implication is that it's this man's eye. However, the man's eyes are brown.

THGhost

Plot hole: Kazam is supposed to be a math genius, something that the plot hinges on, but he makes several mistakes when calculating the number of prime factors to find out whether a room is trapped or not. He says that 462 has three prime factors, when it has four, that 206 has four when it only has two and that 563 has two and 911 has three when both are actually prime numbers.

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Trivia: All the characters in the movie are named after famous prisons around the world - Holloway, Wren, Leavenworth, San Quentin, etc. The characters match the prison types too - Alderson never meets the group, and isolation is the major form of punishment at Alderson Prison in West Virginia. Dr. Holloway is a female doctor, and Holloway Prison is a women's prison in England, Kazan is autistic, and Kazan Prison is Russia is a "disorganized" prison, etc.

Quentin: Start with us. We got an escape artist and a cop. There's gotta be a reason for that. You're a doctor, Holloway. That gives you a function, a reason, right?
Holloway: No! It just makes me go, "Why me and not one of the other ten million doctors out there?"

Leaven: You figure it out! You haven't done anything! All you do is freak out, you murderer.

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Question: How did Quentin find others in the last scene? he was left unconscious and he had no way to figure out where others went after that (considering his lack of knowledge in mathematics) so how could he possibly make his way to the bridge room?

Answer: It's established that sound travels throughout the structure reasonably well. Also, they didn't travel relatively far, even with the rooms shifting.

Actually, considering the distance that they travelled and the injuries he sustained, Quentin would have had extreme difficulty catching up. It looks like the 3 travelled upwards at least 12 cubes, meaning Quentin would have had to climb up each one with the chance that any of the rooms could be trapped fast enough to catch up to them with enough strength left over to kill Leaven.

Adrenaline is an extremely driving force, so I'd still consider it entirely possible it happened that way.

Question: Anyone who has the Cube DVD, is it really true that if you put the DVD disc upside down in your player, that there is another film on it?

Hamster

Chosen answer: Having just tried it with my copy (Region 1), no, it doesn't appear to be true.

Tailkinker

Answer: I have heard that you can often have a short film by the same director on the other side of the DVD.

Simple way to tell is if there's printing on top. For a DVD to be double sided, both sides will have the same blank shiny surface. Any writing, like the name of the film, etc. will render the top level unreadable.

Question: Why/what was Kazan so afraid of, after he fell into the green cube, from the blue one (on top), the one Quentin opened? I remember Kazan saying he didn't like the red ones, but they were in a green one I think. Also, how did he survive in there, is he a survivor of a previous rounds, or how did he know the spike room for example? (00:23:25 - 00:42:35)

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