O-LevelMathematicsNumber4024/21 · May/June 2019 · Q18 Marks

In 2017, Lauren had a monthly income of $1800.

(a)How much was her total income in 2017?[1]
(b)From her monthly income of $1800, Lauren paid the following. Rent $500 Bills $250 Food $120 Travel $240 Clothes $ 70
(b)(i)Each month, Lauren saved the rest of her income. What percentage of the $1800 did she save?[3]
(b)(ii)Lauren's monthly rent was increased by 3.6%. Calculate the new monthly rent.[2]
(c)In 2017, Lauren's monthly income of $1800 was 25% less than her monthly income in 2016. Calculate her monthly income in 2016.[2]

Mark scheme

Marking points from the official mark scheme (May/June 2019). The mark or mark type is shown in brackets.

[1] 21 600
[3] M2 for (1800 - their 1180) / 1800 [× 100] oe or their 1180 / 1800 ×100 or M1 for their 1180 / 1800 [× 100] oe or B1 for 620
[2] M1 for 500 × 1.036 oe
[2] M1 for (100-25)/100 x = 1800 soi

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Topic: Number, O-Level Mathematics (syllabus 4024). Structured question, 8 marks.
Source: O-Level Mathematics, May/June 2019 Paper 2 Variant 1, question 1.

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