Find the odd number: In 49, 140, 112, and 97, three are multiples of 7 while one is not. Identify the non-multiple of 7.

Introduction / Context:
This item distinguishes a non-multiple of 7 among clear multiples of 7.

Given Data / Assumptions:

• Numbers: 49, 140, 112, 97.
• 49 = 7^2; 140 = 7 * 20; 112 = 7 * 16.

Concept / Approach:
Confirm multiples of 7 by division or by recognizing standard products.

Step-by-Step Solution:

Verification / Alternative check:
97 is prime; immediate neighbors 91 and 98 show it cannot be 7k.

Why Other Options Are Wrong:
They are exact multiples of 7 and fit the majority property.

Common Pitfalls:
Mistaking 98 as present; careful reading avoids misselection.

Final Answer:
97 is not a multiple of 7 and is the odd number.