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

Mar 24, 2016

If you look at the odd numbers they go like $1 , 2 , 3 , 4. . .$
The even numbers add $5$ at every step like $5 , 10 , 15. . .$
So the next odd numbers would be $\ldots 20 , 25 , 30. . .$
And the next even numbers would be $\ldots 5 , 6 , 7. . .$
$\ldots 20 , 5 , 25 , 6 , 30 , 7. . .$