Identify whether each of the following variables is discrete or continuous and explain your reasoning.

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1. Number of pepperoni slices on a pizza: Discrete, because it can be counted in whole numbers.
2. The time it takes to run 100 m: Continuous, because it can take any value within a range.
3. Shoe sizes in a class: Discrete, because they are specific, distinct values.
4. The weight of newborn babies at a hospital: Continuous, because it can take any value within a range.
5. The number of students present in a lecture: Discrete, because it can be counted in whole numbers.
6. Temperature of a freezer ($^{\circ}$C): Continuous, because it can take any value within a range.
7. The roll of a fair six-sided die: Discrete, because it has specific, distinct outcomes.
8. The distance between Lagos and Ibadan (km): Continuous, because it can take any value within a range.
9. Population of a country: Discrete, because it can be counted in whole numbers.
10. Blood pressure reading (mmHg): Continuous, because it can take any value within a range.