A list consists of the following pairs of numbers i51 53 55 57 59 61 63 65 67 69 71 73 Categorize th...

Question

A list consists of the following pairs of numbers i51 53 55 57 59 61 63 65 67 69 71 73 Categorize them as pairs of icoprimes iiprimes iiicomposites

Accepted Answer

iTwo numbers are said to be coprime if they do not have a common factor other than 1 Therefore all the given pairs of numbers are coprimes iiA number is called a prime number if it has no factor other than 1 and the number itself Therefore 59 61 71 73 are pairs of prime numbers iiiA number is called a composite number if it has at least one factor other than 1 and the number itself Therefore 55 57 63 65 are pairs of composite numbers

RD Sharma Solutions Class 6 Mathematics Solutions for Playing with numbers Exercise 2.3 in Chapter 2 - Playing with numbers