(30, 45): Not co-prime (GCD = 15). (57, 85): Co-prime (GCD = 1). (121, 1331): Not co-prime (GCD = 11). (343, 216): Co-prime (GCD = 1).
class 6 Mathematics Textbook Chapter 5 question answer
class 6 Mathematics Chapter 5 Prime Time solutions
Which of the following pairs are co-prime: (30, 45), (57, 85), (121, 1331), (343, 216)?
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To determine co-primality, find the greatest common divisor (GCD):
• (30, 45): Not co-prime, GCD = 15.
• (57, 85): Co-prime, GCD = 1, as they share no factors other than 1.
• (121, 1331): Not co-prime, GCD = 11.
• (343, 216): Co-prime, GCD = 1, as no common factors exist.
Pairs are co-prime only if their GCD is 1, ensuring no shared prime factors.
For more NCERT Solutions for Class 6 Math Chapter 5 Prime Time Extra Questions and Answer:
https://www.tiwariacademy.com/ncert-solutions-class-6-maths-ganita-prakash-chapter-5/