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Bank Robbery #1 - Logic Puzzles

After a local bank robbery, five suspects were interviewed.

Below is a summary of their statements.

Police know that each of them told the truth in one of the statements and lied in the other.

From this information can you tell who committed the crime?

Blake said:
   It wasn't Chris
   It was Alex

Drew said:
   It was Chris
   It wasn't Alex

Chris said:
   It was Blake
   It wasn't Emery

Alex said:
   It was Emery
   It wasn't Blake

Emery said:
   It was Drew
   It was Alex

Puzzle Copyright © Kevin Stone

hint hide answer workings

Answer: Drew.

Since each suspect told the truth just once, Emery's statements mean that it was either Drew or Alex.

If it was Alex, then both of Blake's statements would be true, which isn't allowed (and similarly both of Drew's would be false).

Therefore it was Drew. This can be double-checked with all of the other statements.

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