Exam-style question
Try this first
Which statement best describes real numbers in the context of the specification?.
- A.They represent only whole-number quantities
- B.They represent only quantities that can be written as fractions
- C.They represent all possible real-world quantities, including rational and irrational quantities
- D.They represent only quantities used in computer programs
Model answer
What a good answer should say
- They represent all possible real-world quantities, including rational and irrational quantities
Explanation
Why this works
The specification describes ℝ as the set of all possible real-world quantities. It includes both rational and irrational numbers.
Common mistake
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