In the pattern: X, Y, Z, A, ?, C. What character is missing?

A. B

Find the missing number in the series: 1, 3, 5, 7, ?, 11. What number fits in the blank?

B. 9

In the sequence A, B, C, ?, E, F, what character should replace the question mark?

A. D

In the series X, Y, ?, A, B, what character is missing?

A. Z

In the sequence A, B, C, D, ?, F, G, what character should replace the question mark?

A. E