O-LevelAdditional MathematicsVectors in two dimensionsOct/Nov 2011Paper 2 Q1110 Marks
Answer only one of the following two alternatives. EITHER [Figure 11.1 (EITHER)] In the diagram above OA = a, OB = b, OS = (3/5)OA and OT = (7/5)OB. OR [Figure 11.2 (OR)] In the diagram above OC = c and OD = d. The points P and Q lie on OC and OD produced respectively, so that OC : CP = 1 : 2 and OD : DQ = 2 : 1. The line CD is extended to R so that CD = DR.
📋 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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