Arithmetic and geometric sequences

What is the next term of this arithmetic sequence 3, 6, 9, 12?

Which of the following is an arithmetic sequence? 2,3,5,8, 2,7,12,17, 1,1,2,3,5, 2,4,8,16

What is the common difference of this arithmetic sequence? 1,4,7,10,...

What is the 10th term of this sequence? 2,4,6,8...

nth term of the arithmetic sequence: 7, 9, 11, 13,...

nth term of the arithmetic sequence: -1, 3, 7, 11,...

Find the missing number in the pattern: 6, 14, ____, 30, 38,...

Which of the following is not an arithmetic sequence? Options: 1,2,3,4,5; 3,9,27,81; 4.5, 5.0, 5.5, 6.0,...; 13, 2, -9, -20, -31

What is NOT true about the arithmetic sequence: 25, 32, 39, 46, ...?

Work out the missing terms in this arithmetic sequence: ____, 18, ___, 8, 3, ___, -7, -12 ...