A-LevelMathematicsVectorsOct/Nov 2014Paper 1 Q77 Marks
The diagram shows a pyramid OABCX. The horizontal square base OABC has side 8 units and the centre of the base is D. The top of the pyramid, X, is vertically above D and XD = 10 units. The mid-point of OX is M. The unit vectors i and j are parallel to OA and OC respectively and the unit vector k is vertically upwards. [Figure of a pyramid OABCX with vectors i, j, k and labels M, D, 10, 8]
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
🎯 Mark Scheme Breakdown
Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.
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