1. The problem asks for the cube of 5. 2. The cube of a number $n$ is calculated using the formula: $$n^3 = n \times n \times n$$ 3. Applying this formula to 5: $$5^3 = 5 \times 5 \times 5$$ 4. Calculate step-by-step: $$5 \times 5 = 25$$ $$25 \times 5 = 125$$ 5. Therefore, the cube of 5 is $125$. The correct answer is 125.