Number Sequences Explanation

Number Sequences Explanation

Solutions like this and even more are gotten from this site and I tried it out myself too.

1. Alternating addition of 2 or 5.

2,   4,   9,   11,   16,   18,   …
+2   +5   +2   +5   +2

 
 
2. The difference decreases with 1 with increasing sequence.

30   28   25   21   16   10
-2   -3   -4   -5   -6