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Q.

Which of the following is an example of co-prime numbers ?


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a

25,14

b

18,16

c

9,18

d

11,77 

answer is A.

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Detailed Solution

Concept: Co-prime numbers are those which have their highest common factor as 1. In this question try to check each of the options and check which pair has HCF 1. Pairs of numbers known as co-prime numbers have just the number one as their common component. To create a collection of co-prime numbers, there must be a minimum of two numbers. These numbers, such as (4 and 7) and (5, 7, 9) are co-prime numbers since their largest common component is just 1.
Check option A
Question ImageFactorization of  Question ImageFactorization of  Question ImageTherefore, the HCF OF Question ImageHence, the correct answer is option (1).
 
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