50+ Brain Teasers for Middle Schoolers

An electric train is traveling north at a speed of 100 mph. In which direction does the smoke go?

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Three ducks are standing in a line. There are two ducks in front of a duck, two ducks behind a duck and a duck in the middle. How many ducks are there?

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A guest notices a portrait on the wall and asks about the person in the picture. The host responds, “I have no brothers or sisters, but that man’s father is my father’s son.” Who is in the portrait?

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If there are 12 fish and half of them drown, how many remain?

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How many people is “two pairs of twins twice”?

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