2024 General Aptitude - Number System

Let p, q, r and s be distinct positive integers. Let p, q be odd and r, s be even. Consider the following statements : 1. (p - r)² (qs) is even. 2. (q - s)q²s is even. 3. (q + r)² (p + s) is odd. Which of the statements given above are correct?

• 1 and 2 only
• 2 and 3 only
• 1 and 3 only
• 1, 2 and 3