State whether the following statements are true or false. Give reasons for your answers.

**(i)** Every natural number is a whole number.

**(ii)** Every integer is a whole number.

**(iii)** Every rational number is a whole number.

**Solution:**

**(i)** This is true because the collection of whole numbers contains all natural numbers.

**(ii)** This is false. For example: -3 is an integer but it is not a whole number.

** (iii)** This is false because every whole number is a rational number but every rational number is not a whole number. For example: is a rational number but not a whole number.