Natural numbers

Question

One of the miltiples of two co prime numbers is 20 less than 100 and the next is 20 more than 100. Find the co prime numbers.

Answer 1

Coprime numbers have no factors in common other than 1

 

5 and 8 are coprime

 

5(16) = 80

8(10) = 80

 

The next multiple they have in common is 120