# Frequent question: How does the set theory clock work?

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## How do you read a theory clock?

The Mengenlehreuhr consists of 24 lights which are divided into one circular blinking yellow light on top to denote the seconds, two top rows denoting the hours and two bottom rows denoting the minutes. The clock is read from the top row to the bottom.

## When was the Berlin clock built?

Designed like a retro-futuristic conversation piece, the clock was first installed in Berlin in 1975, commissioned by the Berlin senate and designed by inventor Dieter Binninger.

## What Is set theory?

Set theory is the mathematical theory of well-determined collections, called sets, of objects that are called members, or elements, of the set. … So, the essence of set theory is the study of infinite sets, and therefore it can be defined as the mathematical theory of the actual—as opposed to potential—infinite.

## What is the importance of set theory?

Set theory is important mainly because it serves as a foundation for the rest of mathematics–it provides the axioms from which the rest of mathematics is built up.

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