Question

What are the numbers that come next in these sequences: 1,5,2,10,3,15,4?

Answer 1

If you look at the odd numbers they go like `1,2,3,4...`
The even numbers add `5` at every step like `5,10,15...`

Explanation:

So the next odd numbers would be `...20,25,30...`
And the next even numbers would be `...5,6,7...`

The sequence would continue like this:
`...20,5,25,6,30,7...`