Question

which of the following are co- prime numbersc: a) 4 and 18 b) 4 and 15​

Answer 1

Answer:

b ) 4 and 15 is the answer

Step-by-step explanation:

those who have only 1 as there common factor are known as co prime no's

in the case of a) 4 and 18

                         1 x 4 = 4                     1 x 18 = 18

                         2 x 2 = 4                     2 x 9 = 18

they do not have only 1  as there common factor so they are not co prime no's

in the case of b) 4 and 15

                         1 x 4 = 4                       1 x 15 = 15

                         2 x 2 = 4                       3 x 5 = 15

they do have only 1  as there common factor so they are co prime no's

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