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A Flock of Ducks

Solution Step 0/0
A flock of ducks was flying in the sky. One in front, two behind; one behind and two in front; one between two; and three in a row.

How many ducks were in the flock?

Explanations

Three ducks flew one after another.
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Puzzle A Flock of Ducks

Puzzle A Flock of Ducks