1. The problem is to solve the quantitative reasoning involving the numbers 16, 8, and 42. 2. Since the problem is not explicitly stated, let's consider a common quantitative reasoning approach: checking relationships such as addition, subtraction, multiplication, or division. 3. Check if 16 and 8 relate to 42 by addition: $16 + 8 = 24$, which is not 42. 4. Check multiplication: $16 \times 8 = 128$, which is not 42. 5. Check subtraction: $16 - 8 = 8$, which is not 42. 6. Check division: $16 \div 8 = 2$, which is not 42. 7. Since no direct arithmetic relation matches 42, consider if 42 is a result of a different operation or a separate number. 8. Without further context, the problem cannot be solved definitively. 9. Please provide more details or clarify the question for a precise solution.