An even number is a whole number that can be evenly divided by 2. An odd number is a whole number that cannot be evenly divided by 2. A negative number is any number less than zero.
Which of these sets is an ideal in the ring of integers?
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Question context
This question is part of 📏 Arithmetic Aptitude within the broader 🧠 Aptitude Mastery subject and appears in the SPSC – Sindh Public Service Commission preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.