What number should replace the question mark in the series: 1, 4, 9, 16, ?, 36

B. 25

Identify the missing number in the series: 3, 7, 13, 21, ?, 61

A. 31

If '+' represents addition, '-' represents subtraction, '×' represents multiplication, and '÷' represents division, what is the value of 8 × 4 + 2 ÷ 1 - 3?

B. 29

Given that '>' means addition, '<' means subtraction, '=' means multiplication, and '?' means division, evaluate the expression 5 > 3 < 2 = 4 ? 2.

A. 1

If '?' denotes multiplication, '?' denotes addition, '?' denotes subtraction, and '?' denotes division, what is the result of 6 ? 2 ? 3 ? 1 ? 2?

C. 7