Hello,

There's addition of 5 to each increasing number such as

1+5=6
6+5=11
11+5=16
16+5=21

So the series thus formed will be 6,11,16,21,26,31,36,41........

Dear Aspirants ,

As per your query it will not define properly what you wants to know .It is series of number where increment number 5 in every  steps like

=1+5=6+5=11+5=16...

I hope it will help you

Thanks

The given series of numbers is 1, 6, 11, 16, .......
The common difference between each term is 5. That means, by adding 5 to the first term, you will get the second term, again by adding 5 to the second term you will get the third term. Following this method, the next terms will be 21, 26, 31, 36 and so on.