Question

What does ! mean in a math problem?

Multiply each number in sequence from that number to 1.

Subtract each number in sequence from that number to 1.

It is an exciting problem.

Add each number in sequence from that number to 1.

Divide each number in sequence from that number to 1.

Answer 1

In mathematics, the symbol "!" denotes the factorial of a number. The factorial of a non-negative integer \( n \), written as \( n! \), is the product of all positive integers from 1 to \( n \).

For example:
- \( 5! = 5 \times 4 \times 3 \times 2 \times 1 = 120 \)
- \( 3! = 3 \times 2 \times 1 = 6 \)
- \( 0! = 1 \) (by definition)

Therefore, the correct interpretation of "!" is: **Multiply each number in sequence from that number to 1.**