(b) (i)
Candidates should be encouraged to leave out the unit of measurement from calculations and to
give the correct units with their final answer. Frequently seen was, for example, 90
m
2
instead of
(90
m)
2
or just 90
2
. The correct units can then be added to the final answer if not provided on the
answer line. Generally this part was quite well attempted with the main loss of mark being the need
to show the evaluated value of the square root of 9000 which then rounds to 95, not just showing
95. Some trigonometric methods were seen which needed to be completely correct to gain any
marks which was rare. Many candidates did not attempt this question. Several candidates used the
value 95 in a calculation for the perimeter and then subtracted all the other measurements from the
perimeter until they got back to 95
m. Candidates should be reminded that in a ‘show that’ question
they should not use the value they are being asked to show.
(ii)
Candidates who found the previous two parts challenging were more successful in calculating the
cost of fencing the field. This part was well answered with the correct answer seen frequently. One
mark was awarded often for obtaining the perimeter 455. However a large number of candidates
took their answer for the area in part
(a)
and divided it by 5 then multiplied by 48, rather than
finding the perimeter, or missed out 95 when adding the sides together. Other candidates correctly
worked out the perimeter but then only multiplied by 48 and did not divide by 5 also.
Answers
:
(a)
12
150
(b)(ii)
4368

Cambridge International General Certificate of Secondary Education
0580 Mathematics November 2018
Principal Examiner Report for Teachers
© 2018
MATHEMATICS
Paper 0580/32
Paper 32 (Core)
Key messages
To succeed in this paper candidates need to have completed full syllabus coverage, remember necessary
formulae, apply mathematical knowledge in a variety of situations, show all working clearly and use a
suitable level of accuracy. Particular attention to mathematical terms and definitions would help a candidate
to answer questions from the required perspective.
General comments
This paper gave all candidates an opportunity to demonstrate their knowledge and application of
mathematics. Most candidates completed the paper making an attempt at most questions. The standard of
presentation and amount of working shown continued to improve and was generally good. Centres should
continue to encourage candidates to show formulae used, substitutions made and calculations performed.
Attention should be paid to the degree of accuracy required and candidates should be encouraged to avoid
premature rounding in workings. Candidates should be aware of the difference between a time and a time
interval and be able to write both in a correct form. Candidates should also be encouraged to read questions
again to ensure the answers they give are in the required format and answer the question set. When
candidates change their minds and give a revised answer it is much better to delete the incorrect work, to
rewrite their answer completely and not to attempt to overwrite their previous answer. Candidates should

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