A fence may mark me, a deadline may become me, and a joke may reveal me only after it has gone too far. What am I?

Type:Logic

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Hint: It separates what is acceptable from what is not.

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The answer is

A boundary

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A boundary can be physical, like a fence; temporal, like a deadline; or social, like the limit a joke crosses.

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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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