FTCE General Knowledge Math Practice Test

What is the value of 5! (5 factorial)?

1. 120

2. 60

3. 100

4. 24

The correct answer is: 120

The value of 5! (5 factorial) is calculated by multiplying all positive integers from 1 up to 5. Specifically, this means: 5! = 5 × 4 × 3 × 2 × 1. Breaking it down: - Start with 5. - Multiply by 4: 5 × 4 = 20. - Then multiply by 3: 20 × 3 = 60. - Next, multiply by 2: 60 × 2 = 120. - Finally, multiply by 1, which does not change the product. Thus, the final result is 120. This calculation confirms that the correct answer reflects the definition of factorial, where n! = n × (n-1) × ... × 2 × 1. Consequently, the value of 5! is indeed 120.