Linear sequences

1

What is the rule for the number pattern {3}, {6}, {9}, {12}, {...}?

2

What is the rule for the number pattern {5}, {9}, {13}, {17}, {...}?

3

What is the rule for the number pattern {2}, {4}, {8}, {16}, {...}?

4

What's the common difference in the sequence {6}, {8.5}, {11}, {13.5}, {...}?

5

What's the next number in the pattern {6}, {8.5}, {11}, {13.5}, {...}?

6

What's the common difference in the sequence {6}, {3}, {0}, {...}?

7

What's the {n}^{th} term in the sequence {7}, {14}, {21}, {28}, {...}?

8

What's the {n}^{th} term in the sequence {9}, {16}, {23}, {30}, {...}?

9

The {n}^{th} term in a sequence is {3n}-{10}. What's the {10}^{th} term?

10

What's the {1,000}^{th} term in the sequence {3}, {7}, {11}, {...}?