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Difficulty: EasyPuzzle 1213

Puzzle IconI have a drawer full of socks.

There are 5 socks of each colour, red and green, evenly mixed. In the morning, when it is very dark, I need to pull out a pair of socks of the same colour.

How many must I pull out of the drawer to ensure that I have at least one pair of matching socks?

[Ref: ZVFI]

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Difficulty: EasyPuzzle 1214

Which is larger, 3 raised to the 5th power, 5 raised to the third power?

[Ref: ZBSB] © Kevin Stone

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Difficulty: MediumPuzzle 1215

A bookworm eats from the first page of an encyclopaedia to the last page.

The bookworm eats in a straight line.

The encyclopaedia consists of ten 1000-page volumes and is sitting on a bookshelf in the usual order.
Not counting covers, title pages, etc., how many pages does the bookworm eat through?

[Ref: ZPZW]

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Difficulty: EasyPuzzle 1216

If I can boil 2 eggs in 10 minutes.

How long will it take me to boil 5 eggs?

[Ref: ZJQX]

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