Keystones — Lintel
Five GCSE retrieval questions · 27 October 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
400000
Answer: 4 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 56
Answer: (x + 8)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 10cm, angle = 41°. Find opposite
Answer: 8.7cm -
4. Ratio Mixed ratio problems
£245.00 is shared between A and B in the ratio 5:2. How much does A receive?
Answer: £175.00 -
5. Statistics Mean
The mean of 5 numbers is 32. If 4 of them are 36, 37, 41, 31, what is the missing number?
Answer: 15