Three sets
No. Complex numbers is the highest set of numbers you can go, and there are no sets outside of complex numbers.
There are infinitely many whole numbers which are less than 20. Start with 19 and go back, beyond 0, to negative infinity.
1, 2, 4, 5, and 10 can go into 20.
A single number, 20, does not have a lowest common multiple! So there are no two numbers to go in.
1, 2, 4, 5, 10, 20, 25, 50, 100.
6 numbers can go into 20; they are 1, 2, 4, 5, 10 and 20.
1,2,3,4,5,6,10,12,15,20,30,60
No. Complex numbers is the highest set of numbers you can go, and there are no sets outside of complex numbers.
There are infinitely many whole numbers which are less than 20. Start with 19 and go back, beyond 0, to negative infinity.
Any of their multiples
There is no such number. All of these sets go on forever.
35 times equally no numbers left over.
The HCF of 39 and 20 is 1
1, 2, 4, 5, and 10 can go into 20.
The numbers that go into 17 are 1 and 17, as 17 is a prime number and only divisible by 1 and itself. The numbers that go into 20 are 1, 2, 4, 5, 10, and 20, as 20 is a composite number with multiple factors.
A single number, 20, does not have a lowest common multiple! So there are no two numbers to go in.
No, but these numbers do go into 20 evenly: 1, 2, 4, 5, 10, 20.