Exam-style question
Try this first
Which quantity is an irrational real number?.
- A.8
- B.-2/5
- C.√2
- D.15/3
Model answer
What a good answer should say
- √2
Explanation
Why this works
√2 is an irrational number, and irrational numbers are included in the real numbers. The other quantities can be expressed as ratios of integers.
Common mistake
No common mistake is linked to this question yet.