Question

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Answer 1

Step-by-step explanation:

Q.no.14

ans : d.)

in this we can take easy examples band check the given condition,if we are not remembering the properties

option a.) take 3 & 5 ,both are prime and their hcf is one

b.) take 2 & 3 ,hcf =1

c.) take 8 & 10 again hcf = 2

d.) take9 & 10 ,hcf is 1

therefore answer of option d.)