# Maths Playing With Numbers part 11 (Questions: Prime, Composites) CBSE Class 6 Mathematics VI | Summary and Q&A

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August 18, 2016
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LearnoHub - Class 11, 12
Maths Playing With Numbers part 11 (Questions: Prime, Composites) CBSE Class 6 Mathematics VI

## TL;DR

The sum of two odd numbers is always even, and the sum of two even numbers is also even.

## Key Insights

• 🦕 The sum of two odd numbers is always even.
• 🍹 The sum of two even numbers is always even.
• #️⃣ The product of two even numbers is always even.
• #️⃣ Prime numbers can have the same digits.
• 🦕 The sum of three odd numbers can be odd or even.
• 🦕 The product of three odd numbers is always odd.
• 🧑‍🏭 All prime numbers have two factors: 1 and itself.
• #️⃣ 2 is the only even prime number.

## Transcript

hello friends this video on playing with numbers part 11 is brought to you by exam feel calm no more fear from exam so based on whatever we have learnt about crime and composite numbers let us quickly look at some of the questions what does the sum of any two odd numbers even numbers so for each of these type of questions all we need to do is we ne... Read More

### Q: What is the relationship between the sum of two odd numbers?

The sum of two odd numbers is always even. For example, 3 + 5 = 8, 5 + 9 = 14, and 11 + 13 = 24.

### Q: Are all prime numbers odd?

No, not all prime numbers are odd. The prime number 2 is an exception and is the only even prime number.

### Q: Is it true that the sum of two prime numbers is always even?

No, the sum of two prime numbers is not always even. For example, 2 + 3 = 5, which is an odd number.

### Q: Can you find prime numbers with the same digits?

Yes, prime numbers can have the same digits. Examples include 17 and 71, 37 and 73, and 79 and 97.

## Summary & Key Takeaways

• The video explores the relationship between odd and even numbers and examines the sums of various combinations.

• It is observed that the sum of two odd numbers is always even, while the sum of two even numbers is also even.

• The video also discusses the sum of three odd numbers, the product of three odd numbers, and other properties of prime numbers and even numbers.