**Relationships between sets of rational numbers :**

A group of items is called a set. A Venn diagram uses intersecting circles to show relationships among sets of numbers or things.

The Venn diagram below shows how the sets of whole numbers, integers, and rational numbers are related to each other.

When a set is contained within a larger set in a Venn diagram, the numbers in the smaller set are also members of the larger set.

When we classify a number, we can use the Venn diagram to help figure out which other sets, if any, it belongs to.

**Example 1 : **

Classify the number given below by naming the set or sets to which it belongs.

37

**Answer : **

Whole, Integer, Rational

37 is a whole number.

All whole numbers are integers. All integers are rational numbers.

**Example 2 : **

Classify the number given below by naming the set or sets to which it belongs.

-98

**Answer : **

Integer, Rational

-98 is an integer.

All integers are rational numbers.

**Example 3 : **

Classify the number given below by naming the set or sets to which it belongs.

-56.12

**Answer : **

Rational

-56.12 is a rational number.

It is not a whole number because it is negative. It is not an integer because there are non-zero digits after the decimal point.

**Example 4 : **

Classify the number given below by naming the set or sets to which it belongs.

7/8

**Answer : **

Rational

7/8 is a rational number.

It is not a whole number, because it is a fraction of a whole number. It is not an integer because it is not a whole number or the opposite of a whole number.

**Example 5 : **

Classify the number given below by naming the set or sets to which it belongs.

102.353535......

**Answer : **

Rational

102.353535........is a rational number.

Since 102.353535...... is a recurring decimal, it can be converted into fraction. And also it is not a whole number or integer, because it is a fraction.

**Example 6 : **

Classify the number given below by naming the set or sets to which it belongs.

-8

**Answer : **

Integer, Rational

-8 is an integer.

All integers are rational numbers.

**Example 7 : **

Classify the number given below by naming the set or sets to which it belongs.

8

**Answer : **

Whole, Integer, Rational

8 is a whole number.

All whole numbers are integers. All integers are rational numbers.

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