Odd and Even Numbers (Grade 2)
Every number is either odd or even. Even numbers can be split into two equal groups with nothing left over. Odd numbers always have one left over when split into two groups.
In Class 2, we learn to identify odd and even numbers, understand the pattern they follow, and use this knowledge with numbers up to 200.
What is Odd and Even Numbers - Class 2 Maths (Numbers up to 200)?
Even numbers are numbers that can be divided into 2 equal groups with nothing left over.
Even numbers end in: 0, 2, 4, 6, or 8.
Odd numbers are numbers that have 1 left over when divided into 2 equal groups.
Odd numbers end in: 1, 3, 5, 7, or 9.
Even: 0, 2, 4, 6, 8, 10, 12, 14... | Odd: 1, 3, 5, 7, 9, 11, 13, 15...
Odd and Even Numbers (Grade 2) Formula
Quick trick to check odd or even:
- Look at the last digit (ones place) of the number
- If the last digit is 0, 2, 4, 6, or 8 → the number is even
- If the last digit is 1, 3, 5, 7, or 9 → the number is odd
Example: 176 → last digit is 6 → even. 183 → last digit is 3 → odd.
Solved Examples
Example 1: Example 1: Is 8 Odd or Even?
Question: Is 8 odd or even?
Think:
- Split 8 into 2 groups: 4 and 4
- Both groups are equal — nothing left over
- Also, 8 ends in 8 → even
Answer: 8 is even.
Example 2: Example 2: Is 13 Odd or Even?
Question: Is 13 odd or even?
Think:
- Split 13 into 2 groups: 6 and 6 with 1 left over
- There is a remainder → odd
- Also, 13 ends in 3 → odd
Answer: 13 is odd.
Example 3: Example 3: Checking a Big Number
Question: Is 154 odd or even?
Think:
- Look at the last digit: 4
- 4 is in the even list (0, 2, 4, 6, 8)
Answer: 154 is even.
Example 4: Example 4: Checking 199
Question: Is 199 odd or even?
Think:
- Last digit is 9
- 9 is in the odd list (1, 3, 5, 7, 9)
Answer: 199 is odd.
Example 5: Example 5: Sorting Numbers
Question: Sort these numbers into odd and even: 12, 7, 20, 15, 8, 31
Think:
- 12 → last digit 2 → even
- 7 → last digit 7 → odd
- 20 → last digit 0 → even
- 15 → last digit 5 → odd
- 8 → last digit 8 → even
- 31 → last digit 1 → odd
Answer: Even: 12, 20, 8. Odd: 7, 15, 31.
Example 6: Example 6: Even Numbers Between 10 and 20
Question: List all even numbers between 10 and 20.
Think:
- Start from 12 (first even after 10)
- 12, 14, 16, 18
Answer: The even numbers between 10 and 20 are 12, 14, 16, 18.
Example 7: Example 7: Adding Odd and Even
Question: Ria adds two even numbers: 4 + 6 = 10. Is the answer odd or even?
Think:
- 4 is even, 6 is even
- 4 + 6 = 10
- 10 ends in 0 → even
Answer: The answer is even. When you add two even numbers, the sum is always even.
Key Points to Remember
- Even numbers end in 0, 2, 4, 6, or 8.
- Odd numbers end in 1, 3, 5, 7, or 9.
- To check if a number is odd or even, look at the last digit (ones place).
- Even + Even = Even. Odd + Odd = Even. Even + Odd = Odd.
- 0 is an even number.
- Odd and even numbers alternate: 1 (odd), 2 (even), 3 (odd), 4 (even)...
Practice Problems
- Is 47 odd or even?
- Is 120 odd or even?
- List all odd numbers between 20 and 30.
- Sort: 33, 40, 55, 62, 71, 88 into odd and even.
- Aman says 0 is neither odd nor even. Is he correct?
- If you add an odd number and an even number, is the answer odd or even? Give an example.
Frequently Asked Questions
Q1. What are even numbers?
Even numbers are numbers that can be divided into 2 equal groups with nothing left over. They end in 0, 2, 4, 6, or 8.
Q2. What are odd numbers?
Odd numbers are numbers that have 1 left over when divided into 2 equal groups. They end in 1, 3, 5, 7, or 9.
Q3. Is 0 odd or even?
0 is an even number. It can be divided by 2 with nothing left over (0 divided by 2 = 0).
Q4. How do I quickly check if a number is odd or even?
Look at the last digit (ones place). If it is 0, 2, 4, 6, or 8, the number is even. If it is 1, 3, 5, 7, or 9, the number is odd.
Q5. What happens when we add two odd numbers?
When we add two odd numbers, the result is always even. Example: 3 + 5 = 8 (even).
Q6. What happens when we add an odd and an even number?
When we add an odd number and an even number, the result is always odd. Example: 3 + 4 = 7 (odd).
Q7. Do odd and even numbers make a pattern?
Yes. Numbers alternate between odd and even: 1 (odd), 2 (even), 3 (odd), 4 (even), and so on.
