I arrive as a locked question with all the keys hidden in the clues. Solving me means arranging what is already there. What am I?

Type:Logic

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Hint: Do not look outside the clue set first.

Reveal answer

The answer is

A puzzle

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A puzzle presents a question or challenge, but the information needed to solve it is usually contained in the clues and their arrangement.

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Ten seconds before midnight I make a room loud; ten seconds before an exam I make it silent. Same numbers, different feeling. What am I?

Type:LogicTime
Reveal answer

The answer is

A countdown

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Lawyers build me, logicians test me, and one weak premise can make me collapse. What am I?

Type:Logic
Reveal answer

The answer is

An argument

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What is the maximum number of pieces from 3 straight cuts across a round cake, if each cut crosses all previous cuts inside the cake?

Type:Logic
Reveal answer

The answer is

7

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