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, 15, 31, ?, 127

A. 63

What is the missing number in the series: 10, 20, 40, 80, ?, 320

A. 160

If A + B = C, B - A = D, and C * D = E, what is the value of E if A = 3, B = 7?

B. 24

In a code language, let '+' represent multiplication, '-' represent addition, '×' represent subtraction, and '÷' represent division. What is the result of 6 ÷ 2 + 3 × 4 - 5?

A. 10