Keystones — Lintel
Five GCSE retrieval questions · 27 October 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.016
Answer: 1.6 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 8
Answer: (x + 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 46°. Find opposite
Answer: 26.9cm -
4. Ratio Mixed ratio problems
£162.00 is shared between A and B in the ratio 2:1. How much does A receive?
Answer: £108.00 -
5. Statistics Mean
The mean of 5 numbers is 33. If 4 of them are 50, 29, 42, 23, what is the missing number?
Answer: 21