Exam-style question
Try this first
Which answer avoids the common misconception in use numerical methods to solving problems in context?.
- A.I4: avoid assuming that an approximation must be linked to its method and error limitations
- B.Use any familiar GCSE calculation even if it ignores Use numerical methods to solving problems in context
- C.Write only the final answer without showing the mathematical method
- D.Change the notation or restrictions to make the algebra look simpler
Model answer
What a good answer should say
- The correct answer is I4: avoid assuming that an approximation must be linked to its method and error limitations.
- This option is best because state the numerical method, approximation step and limitation of the estimate, then checks that the notation, restrictions and conclusion match the AQA A-level Mathematics objective.
This answer is tied to the objective: I4 Use numerical methods to solve problems in context..
Explanation
Why this works
Use the explanation to connect the worked answer back to I4 Use numerical methods to solve problems in context..
I4: avoid assuming that an approximation must be linked to its method and error limitations is the correct option. It directly supports use numerical methods to solving problems in context by requiring the student to state the numerical method, approximation step and limitation of the estimate.
The other options are weaker because they hide the reasoning, ignore restrictions, or use a generic calculation that may not fit the objective.
Maths method check
- Topic focus: Pure Mathematics.
- Question style: practice.
- Reasoning demand: recall.
- Check the operation, notation, units, and final answer form against the question before moving on.
Common mistake
No common mistake is linked to this question yet.