I think that the next number in this pattern is twelve. I think that the pattern is 1/2, 2/3. 3/4, 4/5 and so on.
10
10
4
The next number is 30. The numbers are increasing in multiples of 5.
10.
The next number in the sequence would be 25.
30
Those are the factors of the number 60, in descending order. The next factor is 10.
10 ten
The next number in the sequence 3-15-6-30-21 is -207.
10,20,30,20
10 The sequence is given by xn = 60/n