Identify the missing term in the series: 3, 7, 15, 31, ?, 127

A. 63

In a code, '?' means addition, '?' means subtraction, '×' means multiplication, and '÷' means division. What is the result of 9 ? 3 × 2 ? 4 ÷ 2?

B. 22

In a coding system, 'FISH' is coded as '6-9-19-8'. What is the code for 'BIRD'?

A. 2-9-18-4

In a group of five people - M, N, O, P, and Q - M is older than N but younger than O. P is younger than Q. If O is the oldest, who is the youngest?

B. N

Four friends, A, B, C, and D, are sitting in a row. A is to the left of B but to the right of C. D is not at either end. What is the correct order from left to right?

A. C, A, B, D