Exam-style question
Try this first
Which of the following is a member of ℤ?.
- A.-3
- B.2.5
- C.1/2
- D.√2
Model answer
What a good answer should say
- -3
Explanation
Why this works
ℤ contains negative whole numbers, including -3. The other options are not written as integers.
Common mistake
No common mistake is linked to this question yet.