## Key Concepts

- Identify a group of objects that are even or odd

### Introduction

Count the number of ice creams and tell if the number is even or odd.

There are seven ice creams. Divide 7 ice creams into pairs to identify whether the number 7 is even or odd.

We cannot divide 7 into 2s because one ice cream is left in the above image. So, seven is an odd number.

Can you count the number of apples present in the image?

Yes, there are 8 apples, and we can divide 8 into 2s. So, 8 is an even number.

### Even Numbers

The objects which we can count by 2s are known as even numbers.

Count the squares by 2s.

Here we can count the squares by 2s like 2, 4, 6, and 8. So, 2, 4, 6 and 8 are even numbers.

**Example:**

Write whether the number of objects present in the image is even or odd.

There are 8 objects present in the image. We can count the objects by 2s. So, 8 is even.

**Example:**

Write whether the number of objects present in the image is even or odd.

**Solution:**

There are 10 objects present in the image. We can count the objects by 2s. So, 10 is even.

**Example:**

Write whether the number of objects present in the image is even or odd.

**Solution:**

There are 16 objects present in the image. We can count the objects by 2s and here 8 pairs of shoes are there. So, 16 is an even number.

**Example:**

Write whether the number of objects present in the image is even or odd.

**Solution:**

There are 8 objects present in the image. We can count the objects by 2s. So, 8 is even.

### Odd Numbers

The object which we cannot count by 2s is known as odd numbers.

Count the squares by 2s.

Here we cannot count by 2s. So, 3 and 5 are odd numbers.

**Example:**

Write whether the number of objects present in the image is even or odd.

**Solution:**

There are 7 objects present in the image. We cannot count the objects by 2s. So, 7 is odd.

**Example:**

Write whether the number of objects present in the image is even or odd.

**Solution:**

There are 5 objects present in the image. We cannot count the objects by 2s. So, 5 is odd.

**Example:**

Write whether the number of objects present in the image is even or odd.

**Solution:**

There are 7 objects present in the image. We cannot count the objects by 2s. So, 7 is odd.

**Example:**

Write whether the number of objects present in the image is even or odd.

**Solution:**

There are 9 objects present in the image. We cannot count the objects by 2s. So, 9 is odd.

**Example: **

Write whether the number of objects present in the image is even or odd.

**Solution:**

There are 11 objects present in the image. We cannot count the objects by 2s. So, 11 is odd.

## Exercise

- Write whether the number is even or odd.

- Write the equation for this model

- Count the number of squares present in the image and write if it is odd or even.

- Write whether the number of objects present in the image is even or odd.

- Count the number of squares present in the image and write if it is odd or even?

- Write the equation for this model.

- Write whether the number of objects present in the image is even or odd.

- Count the number of squares present in the image and write if it is odd or even?

- Write the equation for this model.

- Count the number of squares present in the image and write if it is odd or even?

### Concept Map

### What we have learned

- How to identify a group of even and odd numbers?