how to use a variable to write a pattern rule for a number pattern

Question

use a varible to write a pattern rule for each number pattern

a)  2,3,4,5,6,7        b) 10,11,12,13,14,15        c) 8,9,10,11,12,13

Answer 1

Use inductive reasoning to describe each pattern. Then find the next two numbers in each pattern.

6.) 3,1,-1, -3

Answer 2

1

11

21

1211

111221

312211

131122211

113213211

31131211131221

Answer 3

next three numbers in pattern, 600, -300, 150?

Answer 4

please help  me with the number patterns 51,44,37,30

Answer 5

I want  patterns in numbers.

Answer 6

whats the next number in this pattern? 1,3,7,15,21

Answer 7

if this decreasing pattern continues, what will be the next three numbers in the patern? 27,9,3,1,

Answer 8

i have noooooooooooo idea