Question

Make pairs of coprime numbers from
15, 21, 28, 16, 11​

Answer 1

Two numbers are coprime if their highest

common factor (HCF ) is 1 .

15 = 3 × 5

21 = 3 × 7

28 = 2 × 2 × 7

16 = 2 × 2 × 2 × 2

11 = 11

Now pair of course prime are

( 11 , 15 ) , ( 11 , 21 ) , ( 11 , 28 ) , ( 11 , 16 ),

( 15 , 28 ), ( 15 , 28 ) , ( 15 , 16 ) ,

( 21 , 28 ) , ( 21 , 16 ) ,

I hope this helps you.

Answer 2

Answer:

15, 16, 21, 28.

Step-by-step explanation:

I hope you have understood.