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O-LevelMathematicsNumber4024/11 · Oct/Nov 2020 · Q63 Marks

Mariah's age is 17 years 5 months. Her brother is 20 months younger. Find the age of her brother.

  1. (a)Mariah's age is 17 years 5 months. Her brother is 20 months younger. Find the age of her brother.[1]
  2. (b)Write 48 minutes 2 hours 18 minutes as a fraction in its simplest form.[2]

Mark scheme

Marking points from the official mark scheme (Oct/Nov 2020). The mark or mark type is shown in brackets.

  1. [1] 15 years 9 months
  2. [2] 8/23
  3. B1 for 138 or 0.8 and 2.3 or 2880 and 8280 or for correct equivalent fraction with consistent units

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About this question

Topic
Number, O-Level Mathematics (syllabus 4024). Structured question, 3 marks.
Source
O-Level Mathematics, Oct/Nov 2020 Paper 1 Variant 1, question 6.

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