- SUM
- ADD
- MAX
- SQRT

**B. ADD**

_________ is not a function in Microsoft Excel Spreadsheets?

In Microsoft Excel, there are numerous built-in functions that help users perform calculations, analyze data, and manipulate text. These functions are designed to make it easier for users to complete a wide range of tasks within spreadsheets.

Among the options provided, the ADD function is not a valid function in Excel. The correct answer is **B. ADD**. In this in-depth explanation, we will discuss the other three functions (SUM, MAX, and SQRT) and explain why ADD is not a valid function.

## SUM Function

The SUM function is one of the most commonly used functions in Excel. It allows users to calculate the sum of a range of numbers, making it an essential tool for various calculations.

### Syntax

The syntax for the SUM function is:

SUM(number1, [number2], ...)

`number1`

: The first number or cell reference to include in the sum.`number2`

: (Optional) Additional numbers or cell references to include in the sum. You can include up to 255 arguments.

### Example

=SUM(A1:A10)

This formula calculates the sum of the values in the range A1 to A10.

## MAX Function

The MAX function returns the highest value from a range of numbers or a list of arguments. It is useful for determining the maximum value in a dataset, such as the highest sales figure or the greatest test score.

### Syntax

The syntax for the MAX function is:

MAX(number1, [number2], ...)

`number1`

: The first number or cell reference to consider for finding the maximum value.`number2`

: (Optional) Additional numbers or cell references to consider for finding the maximum value. You can include up to 255 arguments.

### Example

=MAX(B1:B20)

This formula returns the highest value in the range B1 to B20.

## SQRT Function

The SQRT function is used to calculate the square root of a number. It is helpful in various mathematical and statistical calculations, such as finding the standard deviation or determining the length of the sides of a square.

### Syntax

The syntax for the SQRT function is:

SQRT(number)

`number`

: The number for which you want to find the square root. This must be a positive number or zero.

### Example

=SQRT(C5)

This formula calculates the square root of the value in cell C5.

## Why ADD is Not a Function in Excel

The ADD function is not a valid function in Microsoft Excel, as the same functionality is already provided by the SUM function. The SUM function is more versatile, as it can handle multiple arguments and calculate the sum of a range of numbers. In contrast, an ADD function would likely be limited to adding only two numbers, making it less useful for most spreadsheet applications.

For example, if you wanted to add the values in cells A1, A2, and A3, you could use the SUM function like this:

=SUM(A1, A2, A3)

This formula would provide the same result as an ADD function, such as:

=ADD(A1, ADD(A2, A3))

However, the SUM function is more concise and efficient, making the ADD function unnecessary.