Keystones — Lintel
Five GCSE retrieval questions · 31 March 2021 · mathsvault.uk/keystones
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1. Number
The temperature is -9°C. It rises by 18°C. What is the new temperature?
Answer: 9°C -
2. Algebra
Factorise fully: 28x² + 12x
Answer: 4x(7x + 3) -
3. Geometry
Calculate the hypotenuse when a = 8cm and b = 9cm
Answer: 12.04cm -
4. Ratio
Find 25% of 258
Answer: 64.5 -
5. Statistics
Find the range of: 3, 8, -19, 28, 23
Answer: 47