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Edexcel IGCSE Math A Higher 1.8.HA bounds problems

Edexcel IGCSE Math A Higher 1.8.HA bounds problems
Edexcel IGCSE Math A syllabusMath A 4MA1First assessment 2018

Practise bounds-problem questions by choosing which variables need upper or lower bounds in formulae such as D, G, T or acceleration.

How this is tested

  • Choose upper or lower bounds for each variable in formulae before substituting.
  • Calculate bounds for areas, distances or speeds before giving a rounded final answer.
  • Use measurements and formula structure to maximise or minimise a length or value.

Question 24

24D=np−q24 D=\frac{n}{p-q}
n=10.3 correct to 1 decimal place
p=7.24 correct to 2 decimal places
q=4.39 correct to 2 decimal places
By considering bounds, work out the value of D to a suitable degree of accuracy. Show your working clearly.