Keystones — Lintel
Five GCSE retrieval questions · 12 June 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
990000
Answer: 9.9 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 12
Answer: (x + 6)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 37°. Find opposite
Answer: 21.9cm -
4. Ratio Mixed ratio problems
£105.00 is shared between A and B in the ratio 2:3. How much does A receive?
Answer: £42.00 -
5. Statistics Mean
The mean of 6 numbers is 32. If 5 of them are 40, 37, 32, 41, 22, what is the missing number?
Answer: 20