O-LevelMathematicsNumber4024/12 · May/June 2016 · Q225 Marks
The table shows the populations, correct to 2 significant figures, of some African countries in 2014. Country | Population --------|----------- Nigeria | Sudan | 3.6 x 10^7 Chad | 1.1 x 10^7 Namibia | 2.2 x 10^6
- (a)In 2014, the population of Nigeria was 177156000. Complete the table with the population of Nigeria using standard form, correct to 2 significant figures.[2]
- (b)Complete the following. The population of Chad was ______ times the population of Namibia.[1]
- (c)The population density of a country is measured as the number of people per square kilometre. It can be found by dividing the population of the country by its area in km². The area of Sudan is 1.86 × 10^6 square kilometres. Estimate the population density of Sudan. Give your answer correct to 1 significant figure.[2]
Mark scheme
Marking points from the official mark scheme (May/June 2016). The mark or mark type is shown in brackets.
- [2] (a) 1.8 × 10^8 cao C1 for 1.7[...] × 10^8 or answer figs 18
- [1] (b) 5
- [2*] (c) 20 cao C1 for answer figs 2 or answer 18 OR B1 for 4 × 10^7 oe and 2 × 10^6 oe seen
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