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General Mathematics Paper 2, Nov/Dec. 2008  
Questions: 1 2 3 4 5 6 7 8 9 10 11 12 13 Main
General Comments
Weakness/Remedies
Strength
Question 1

(a) If x:y = 2:3, evaluate
                                    x2 – y2
                                    y2 + x2
 
(b) A man on the same level ground with a tree, stands at a distance of 12.82m away from the foot of the tree. He observes the angle of elevation of the top of the tree as 52o. If the man is 1.24m tall, calculate correct to two decimal places, the height of the tree.
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Observation

Question 1(a) was reportedly popular among the candidates and many candidates performed well.  However, quite a number of them displayed poor knowledge of ratio by substituting the values 2 and 3 for x and y respectively.  They were expected to recognise that if x:y = 2:3 then x/y = 2/3 or  x = 2y/3.   Similarly, they can be expressed as x = 2k and y = 3k where k is a constant.

Question 1 (b) was also well attempted.  However, it was noticed that many candidates could not draw the diagram.  Others did not add the man’s height to the calculated height and hence lost some marks.
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