Exercise 1 Page 14

Before we consider the given number, let's recall the different number sets.

• Rational Number: A number is a rational number if it can be written in the form $\frac{a}{b},$ where $a$ and $b$ are both integers and $b\ne 0.$
• Integer: A number is an integer if it is a positive or negative counting number (or zero). All integers are also rational numbers because any number can be written as a division by one, $\frac{a}{1}.$

• Whole Number: A number is a whole number if it is a non-negative counting number. All whole numbers are also integers and rational numbers.

• Natural Number: A number is a natural number if it is a positive counting number. All natural numbers are also whole numbers, integers, and rational numbers.

• Irrational Number: An irrational number is a number that cannot be written in the form of a rational number. These are recognized as being non-repeating, infinite decimals.
• Real number: A number is a real number if it is either rational or irrational.

Now, let's try to categorize the given number using these definitions. This is a positive counting number. This means that it is a natural number as well as a whole number, integer, rational number, and real number.