Problem-Solving and Data AnalysisEasy–MediumFertiliser for a larger lawn
Problem-Solving and Data Analysis practice question
A gardener uses 4 kilograms of fertiliser for every 10 square metres of lawn. How many kilograms are needed for 25 square metres?
Answer: 10
4/10 = 0.4 kg per square metre, and 25 × 0.4 = 10.
Common wrong answers
- If you answered 19
- 19 adds 15 to 4.
- If you answered 100
- 100 multiplies 4 by 25.
- If you answered 6.25
- 6.25 inverts the ratio.
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