Understanding Number Sequences

What is the common difference in the arithmetic sequence 5, 8, 11, 14?

In a geometric sequence, if the first term is 3 and the common ratio is 2, what is the fourth term?

What is the common difference in the sequence 19, 15, 11, 7?

In the sequence 320, 160, 80, what operation is used to find the next term?

What is the next number in the sequence 13, 6, 10, if the pattern is increasing by 2, 3, 4?

In the sequence 2, 6, 5, 9, what is the pattern?

What is the next number in the sequence 1, 2, 6, 15, if the differences are perfect squares?

In the sequence 1, 2, 6, 15, what is the difference between the third and fourth terms?

What is the pattern in the sequence 1, 2, 6, 15, if the differences are 1, 4, 9?

In the sequence 1, 2, 6, 15, what is the next number if the differences are perfect squares?