Brainteaser #5: Can You Answer This Clever Question?

Jul 19, 2017 by apost team

Are you a brain teaser master? This is the fifth in a challenging collection of clever questions to test your brain power - let us know how you do! 

[Answer below]

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Did you figure it out? Here is the answer:

Electric trains don't emit smoke.

Did you get it right? Test your friends and SHARE these challenging brain teasers!