Write the following sets in roster form :
the set of whole numbers which are multiples of 5

Answer

To write the set of whole numbers which are multiples of 5 in roster form, follow these steps:

### Step 1: Understand the concept of multiples of 5
Multiples of 5 are numbers that can be expressed as 5 times an integer. This means that if you multiply 5 by any whole number (0, 1, 2, 3, ...), you will get a multiple of 5.

### Step 2: Identify the whole numbers
Whole numbers start from 0 and include all positive integers (0, 1, 2, 3, ...).

### Step 3: Generate the multiples of 5
Start from 0 and multiply by 5:
- 5 × 0 = 0
- 5 × 1 = 5
- 5 × 2 = 10
- 5 × 3 = 15
- 5 × 4 = 20
- 5 × 5 = 25
- 5 × 6 = 30
- 5 × 7 = 35
- 5 × 8 = 40
- 5 × 9 = 45
- and so on...

### Step 4: Write in roster form
In roster form, we list the elements of the set within curly braces. The set of whole numbers which are multiples of 5 can be written as:
\[ A = \{0, 5, 10, 15, 20, 25, 30, 35, 40, 45, \ldots\} \]

### Final Answer
The set of whole numbers which are multiples of 5 in roster form is:
\[ A = \{0, 5, 10, 15, 20, 25, 30, 35, 40, 45, \ldots\} \]

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