Question

Which one of the following is an example of Co-Prime numbers?
1. (2, 3), (4, 5), (7, 9),(8, 11)
2. (1, 2), (3, 4), (5, 6), (11, 5)
3. (0, 1), (2, 3) ,(4, 5), (7, 5)
4. (0, 2), (4, 6) ,(8, 5), (9, 7)

Answer 1

Correct Answer - Option 1 : (2, 3), (4, 5), (7, 9),(8, 11)

Concept

The numbers are co-prime if they contain only 1 as the common factor.

Co-Prime Numbers = Two natural numbers a and b are said to be co-prime if their HCF is 1.

Natural Numbers: All counting numbers are called natural numbers.

Example: 1, 2, 3, 4.....

Whole Number: All counting numbers and 0 forms the set of the whole number.

Example: 0, 1, 2, 3, 4,.....

Even Number: A number that is divisible by 2 is called an even number.

Example: 2, 4, 6, 8....

Odd Number: A number not divisible by 2 is called an odd number.

Example: 1, 3, 5, 7, 9....

∴ (2, 3), (4, 5), (7, 9), (8, 9) is an example of Co-Prime numbers.