arithmetic sequemce practice

How many terms are there in the sequence 1, 4, 7, 10, ..., 682?

Find the 20^th term of 2, 5, 8, 11 ....

What is the general term formula for the following sequence?

7, 27, 47, 67,...

Find the 46^th term of the arithmetic sequence 3, 8, 13, 18, 23, ...

Find the 32nd term of this sequence.
9, 4, -1, -6, -11, ...

Find the given term for the sequence. 
Find a₆₄  for a_n = 5n + 4

The first three terms and the last term of a finite arithmetic sequence are - 92, - 88, - 84, ...,12.Find the number of terms in the sequence.

what is giving you a hard time? not enough practice? Dont remember what to do? please explain. i know it can be hard to ask for help, but dont let that stop you. Tell me what is going on.