ISEE Mathematics Achievement Question 13: Answer and Explanation
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Question: 13
13. Stewie knows that y is an integer greater than 4 and less than 10, and Peter knows that y is an integer greater than 5 and less than 12. If they share their information about y, then they know that y must be
- A. one of exactly 2 possible values
- B. one of exactly 4 possible values
- C. one of exactly 5 possible values
- D. one of exactly 7 possible values
Correct Answer: B
Explanation:
B
First, list out Stewie's integers: 5, 6, 7, 8, and 9. Now list out Peter's integers: 6, 7, 8, 9, 10, and 11. Finally, circle any that are on both lists: 6, 7, 8, and 9.