Which of the following collections are sets?
All easy problems in your book on mathmatics.

Answer

To determine whether the collection "All easy problems in your book on mathematics" is a set, we need to analyze the definition of a set and the characteristics of this collection.

### Step-by-Step Solution:

1. **Definition of a Set**: A set is a well-defined collection of distinct objects, where each object is called an element. The elements must be clearly defined so that it is possible to determine whether an object belongs to the set or not.

2. **Analyzing the Collection**: The collection in question is "All easy problems in your book on mathematics."

3. **Subjectivity of 'Easy'**: The term "easy" is subjective. What one person considers easy, another person might find difficult. This means that the classification of problems as "easy" can vary from person to person.

4. **Lack of Clear Definition**: Since the collection of "easy problems" does not have a clear and universally accepted definition, it cannot be determined which problems belong to this collection.

5. **Conclusion**: Because the collection is not well-defined due to the subjective nature of what constitutes an "easy" problem, it does not meet the criteria to be considered a set.

### Final Answer:
The collection "All easy problems in your book on mathematics" is **not a set**.

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