Class 6 Maths - KERALA

Prime Time

The chapter Prime Time in Class 6 Mathematics for Kerala SCERT introduces students to the fascinating world of numbers, focusing on factors and multiples. Students learn to explore the properties of numbers, distinguishing between composite numbers and prime numbers, which cannot be divided evenly by any number other than one and themselves. This chapter builds a strong foundation for higher-level mathematics by teaching methods to find the Greatest Common Divisor (GCD) and Least Common Multiple (LCM). It is highly important for school board exams as it forms the basis for fraction operations and algebraic problem-solving in upcoming classes.

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Key Concepts

Factors

Factors are numbers that divide evenly into another number without leaving a remainder.

Multiples

Multiples are the results you get when you multiply a number by whole numbers like 1, 2, 3, and so on.

Prime Numbers

A prime number is a whole number greater than 1 that has only two factors: 1 and itself.

Composite Numbers

Composite numbers are whole numbers greater than 1 that have more than two factors.

Prime Factorization

Prime factorization is the process of expressing a composite number as the product of prime numbers.

Important Formulas

Every composite number can be written as a product of prime numbers.
LCM × HCF = Product of two numbers (useful for finding common multiples and factors).

Board Exam Info

In Kerala SCERT Class 6 Mathematics examinations, this chapter typically carries around 6 to 8 marks. Common question types include identifying prime and composite numbers from a given set, finding all factors of a number, writing prime factorizations, and word problems involving LCM and HCF.

Frequently Asked Questions

Is the number 1 a prime number?

No, 1 is neither a prime nor a composite number because it has only one factor (itself).

What is the only even prime number?

The number 2 is the only even prime number, as all other even numbers can be divided by 2.

How do I know if a number is prime?

Check if it can be divided by any prime number smaller than itself, like 2, 3, 5, or 7. If it cannot be divided evenly by any of them, it is prime.

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