Number

 In our last post, we discussed maths phobia. We saw how an interesting subject slowly turned into fear for us, and how this fear passed from one generation to the next. It became so dangerous that we even started getting scared just by hearing the word maths.

Let’s try to remove this phobia and begin by understanding maths.

And when it comes to understanding maths, we must know the ABCD of maths.

To understand maths, the very first thing we need to understand is numbers, because maths starts with numbers.

So today, let’s discuss some important types of numbers.

Types of Numbers

1. Natural Numbers

In our daily life, we very often feel the need for counting.

For example:

• Counting the number of children

• Counting players in a team

• Counting items while shopping

The numbers that help us in counting are called natural numbers.

Examples:

1, 2, 3, 4, 5, …

2. Even Numbers

Numbers that are completely divisible by 2 are called even numbers.

This means when we divide these numbers by 2, the result is a whole number and there is no remainder.

Examples:

2, 4, 6, 8, …

Division by 2:

• 2 ÷ 2 = 1

• 4 ÷ 2 = 2

• 6 ÷ 2 = 3

• 8 ÷ 2 = 4

So, all these numbers are even numbers

3. Odd Numbers

Numbers that are not completely divisible by 2 are called odd numbers.

When we divide these numbers by 2, the result is not a whole number and a remainder is left.

Examples:

1, 3, 5, 7, …

Division by 2:

• 1 ÷ 2 = 0.5

• 3 ÷ 2 = 1.5

• 5 ÷ 2 = 2.5

• 7 ÷ 2 = 3.5

So, because these numbers cannot be divided by 2 completely, they are called odd numbers.

Practice Set: Numbers

A. Identify the type of number

Write Natural, Even, or Odd.

1. 1

2. 4

3. 7

4. 10

5. 15

6. 18

B. Even or Odd?

Tick (✔) the correct option.

7. 9 → Even / Odd

8. 12 → Even / Odd

9. 21 → Even / Odd

10. 30 → Even / Odd

C. Divide by 2

Divide the following numbers by 2 and say whether they are Even or Odd.

11. 6 ÷ 2 = ______

12. 5 ÷ 2 = ______

13. 14 ÷ 2 = ______

14. 11 ÷ 2 = ______

Answers

A. Identify the type of number

1. 1 → Natural, Odd

2. 4 → Natural, Even

3. 7 → Natural, Odd

4. 10 → Natural, Even

5. 15 → Natural, Odd

6. 18 → Natural, Even

B. Even or Odd?

7. 9 → Odd

8. 12 → Even

9. 21 → Odd

10. 30 → Even

C. Divide by 2

11. 6 ÷ 2 = 3 → Even

12. 5 ÷ 2 = 2.5 → Odd

13. 14 ÷ 2 = 7 → Even

14. 11 ÷ 2 = 5.5 → Odd


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