Generate a formula from a sequence test questions

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

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

Calculate the rule for finding the number of legs (L) on any number of spiders (S).

Find the rule to calculate the n^th term of the following sequence:

9, 13, 17, 21.

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

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

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

Find the 100th term of the sequence shown in the table below:

Find the rule to calculate the n^th term of the following sequence:

1, 5, 9, 13

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