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4MA1/1FR Jun 2018, Question 9: Directed Numbers

Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 1FR (Foundation) · Calculator · 4 marks

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The question, in short

Using a table of midnight and midday temperatures in °C for five ski resorts, answer three parts about lowest temperature, Chamonix's rise, and temperature at height.

Summarised in our own words. Use the official paper for the exact wording and any diagrams.

Part (a) · 1 mark

Identify which of the five ski resorts has the lowest midnight temperature from the table.

  1. 1The midnight temperatures are −5, −8, −5, −2 and −7
  2. 2The lowest is −8, which is Alto Campoo

AnswerAlto Campoo

Part (b) · 1 mark

Calculate how much Chamonix's temperature increased between midnight and midday.

  1. 1Chamonix was −5 °C at midnight and 3 °C at midday
  2. 2The increase is 3 − (−5) = 8 °C

Answer8

Part (c) · 2 marks

Given a 1 °C fall per 300 m, find the midnight temperature 1800 m above Asiago.

  1. 1Asiago was −7 °C at midnight
  2. 21800 ÷ 300 = 6, so the temperature falls by 6 °C
  3. 3−7 − 6 = −13 °C

Answer−13

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