Question

from the set (2/3/4/5/6/7/8/9)how many pairs of co prime can be found ​

Answer 1

Answer:

{2,3}

{3,4}

{4,5}

{5,6}

{6,7}

{7,8}

{8,9}

{9,2}

{9,4}

{9,5}

{............

the co-prime no r the. no which r divide only by 1 and itself

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Answer 2

Answer:

19 pairs of coprimes are possible. Those are (2,3),(2,5),(2, 7),(2,9),(3,4),(3,5),(3,7),(3,8),(4,5),(4,7),(4,9),(5,6),(5,7),(5,8),(5,9),(6,7),(7,8),(7,9),(8,9).Pairs of

Coprimes are the pairs have no common factor.