Keystones — Lintel
Five GCSE retrieval questions · 25 January 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.015
Answer: 1.5 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 56
Answer: (x + 8)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 45°. Find opposite
Answer: 19cm -
4. Ratio Mixed ratio problems
£350.00 is shared between A and B in the ratio 5:2. How much does A receive?
Answer: £250.00 -
5. Statistics Mean
The mean of 4 numbers is 38. If 3 of them are 15, 42, 17, what is the missing number?
Answer: 78