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Q Amy, Bob, Carrie, and Dan are standing in line to buy ice cream. See if you can figure out their order from the following clues:

Carrie is between Amy and Bob.
Dan is next to Amy.
Bob is not first.


  
A Dan is first, Amy is second, Carrie is third, and Bob is fourth.

The key is that Bob can't be first. So if Carrie is between Amy and Bob, Carrie must be third, and second and fourth place go to Amy and Bob, but we don't know which is which. We do know that Dan must be first. And one of the clues tell us that Dan is next to Amy, which makes Amy second, leaving fourth place for Bob.

Source: Lowell House,Brain Games,p.27