# A letter that is used in place of a numeral is known as?

A variable is an entity that can take different numerical values and its value is not fixed. It is represented using different letters such as a, b, x, y, z, p, q, etc.

## Answer: A letter that is used in place of a numeral is known as a variable.

Let's see in detail.

**Explanation:**

An expression is a composite entity formed by combining variables and constants using various mathematical operations.

Let’s consider an example of the expression, and list the variable and constants:

In the expression: 2x^{2} + 3, x is the variable while 2 and 3 are constant.