Concept:An open-ended question has many possible correct answers and encourages deeper thinking, not just a single fixed response.
Explanation:Option A asks to arrange numbers in ascending order; only one correct order exists. It is closed-ended.
Option B asks which is more:
31​ or
57​. The only correct answer is
57​. So it is closed-ended.
Option C asks to write any four numbers greater than 2.7. There are infinitely many numbers above 2.7, so students can give different correct answers. This uses their understanding of decimals and comparison. It is open-ended.
Option D asks: "What is 7 more than
72​?" The exact answer is
751​. So it is closed-ended.
Answer:Option C: Write any four number greater than 2.7.