Class 6 Maths - UP
Prime Time
The chapter Prime Time in Class 6 Mathematics introduces students to the fascinating world of numbers by exploring factors, multiples, prime numbers, and composite numbers. Students learn how to break down numbers into their building blocks, which is essential for working with fractions and finding LCM and HCF. This chapter builds a strong foundation for arithmetic operations and logical thinking. In the UP Board examinations, questions from this chapter frequently appear in the form of short answer questions, fill-in-the-blanks, and problem-solving sums, carrying an estimated weight of 4 to 6 marks.
Start Learning FreeKey Concepts
Factors
A factor of a number is an exact divisor of that number, meaning it divides the number without leaving any remainder.
Multiples
A multiple of a number is obtained by multiplying it by any natural number like 1, 2, 3, and so on.
Prime Numbers
Numbers greater than 1 that have only two factors: 1 and the number itself, such as 2, 3, 5, and 7.
Composite Numbers
Numbers having more than two factors, which means they can be divided by numbers other than 1 and themselves.
Co-prime Numbers
Two numbers are said to be co-prime if they do not have any common factor other than 1.
Important Formulas
Board Exam Info
In the UP Board Class 6 Mathematics examination, this chapter usually carries around 4 to 6 marks. Common question types include finding all factors of a given number, writing the first few multiples, identifying prime and composite numbers from a given list, and testing divisibility rules.
Frequently Asked Questions
Is 1 a prime number?
No, 1 is neither prime nor composite because it has only one factor, which is itself.
What is the only even prime number?
2 is the only even prime number. All other even numbers are composite because they are divisible by 2.
How can we quickly find if a number is prime?
Check if it is divisible by any prime numbers less than its square root. If it has no factors other than 1 and itself, it is prime.
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