Keystones — Lintel
Five GCSE retrieval questions · 30 June 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
98000000
Answer: 9.8 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 25
Answer: (x - 5)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 60°. Find opposite
Answer: 43.3cm -
4. Ratio Mixed ratio problems
£288.00 is shared between A and B in the ratio 5:4. How much does A receive?
Answer: £160.00 -
5. Statistics Mean
The mean of 4 numbers is 35. If 3 of them are 40, 38, 17, what is the missing number?
Answer: 45