Continuity: During the first meeting with Ben, the cards that Micky deals alternate from face up, face down, and missing altogether.
Continuity: When Ben's mom is serving birthday cake to Ben and his friends, she serves Cam twice.
Errors in geography: There are multiple errors in Vegas hotel locations - seeming to be in one hotel when the shot from the window makes it clear they are elsewhere, particularly when visiting a suite said to be at the Hard Rock but clearly the view is from a tall Strip hotel. The Hard Rock Hotel is neither.
Errors in geography: In the montage scene showing the "extravagant" lifestyle of the group, the film cuts to scenes at the blackjack table, inside of clubs, etc. It's supposed to happen in or around the Planet Hollywood Casino/Hotel, but many of the locations shown are from Red Rock Casino game room and the club "Cherry". Red Rock is about 12.5 miles northwest of the Strip, surrounded by houses and deserts.
Continuity: When Ben is handed his earnings from the first night a five dollar bill is seen on the outside of the bundle. Moments later a $100 is on the outside.
Continuity: During the opening credits, while Ben is riding his bike on the road, you see the same orange PT cruiser go past twice and the same silver Chrysler 300C go past three times.
Continuity: During the opening scene montage, when Ben is riding his bike across the bridge, the position of his backpack changes several times.
Continuity: When Prof Rosa calls Cole, Terry answers the phone and places Rosa on hold. However, when Cole takes the phone from Terry, he does not take Rosa off of hold and proceeds to talk to him.
Continuity: When Mickey and Ben are walking through the park before the first trip, there is no one behind them. The camera changes and there is a woman walking her dog and another man.
Continuity: When Ben is riding his bike on the bridge, a young guy with a lady are passing in the back stage. After this, when a yellow stripped bus passed behind Ben, that young guy and lady disappeared (it seems, they jumped into water) then another lady in white jacket appears who was absent before in the back stage.
Errors in geography: A scene in Boston shows Ben and Jill riding the red-line T inbound. She disembarks at a stop announced over the PA as "Quincy Center." That stop is outbound from the point they got on the T.
Factual errors: There is no class 2.09 at MIT, though the 2.09 class seems to pay homage to 2.70 (aka 2.007) which is a renowned robotics competition.