**Q.4:** 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) Every natural number is a whole number.

- True, since the collection of whole numbers contains all natural numbers.

(ii) Every integer is a whole number.

- False, as integers may be negative but whole numbers are always positive.

(iii) Every rational number is a whole number.

- False, as rational numbers may be fractional but so they include numbers which are not whole numbers.