6. A number is divisible by both 5 and 12. By which other number will that number be always divisible?
Factors of 5=1,5
Factors of 12=1,2,3,4,6,12
As the common factor of these numbers is 1, the given two numbers are coprime and the number will also be divisible by their product, i.e. 60, and the factors of 60=1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60.