Question

what is the pattern of the following sequence 6,11,16,21

Answer 1

the answer is it adds 5 every time.
6 + 5 =  11
11 + 5 = 16
16 + 5 = 21
6, 11, 16, and 21

Answer 2

Adding 5 to each term.
6+5=11
11+5=16
&
16+5=21

Hope it helped!