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In the local wood there are a number of trees. On these trees there are a number of birds.

A local bird spotter knows that there are as many birds on each tree as there are trees in the wood, and that there are between 2,000 and 2,100 birds in total.

How many trees are there in the wood?

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What well known saying is expressed here:

Refrain from enumerating your owned domestic fowl while their hard, porous calcium containers are undamaged.

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What animal comes next in this sequence:

dog · rooster · monkey · sheep · horse · snake · ?

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What is the minimum number of queens required on a chessboard such that all squares are attacked?

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