Question

Show that 45 and 56 are co-prime numbers
Out of 15, 16, 21 and 28, find out all the pairs of co-prime numbers​

Answer 1

co prime are those number who does not have a common factor

45/56

Prime factorisation of

45=5*3*3

56=7*2*2*2

So as we can see there are no common factor hence they are co prime

Out of these

15 and 16 are co prime

16 and 21 are co prime

15 and 28 are co prime

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