Keystones — Lintel
Five GCSE retrieval questions · 19 October 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
1700000
Answer: 1.7 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 20
Answer: (x + 5)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 56°. Find opposite
Answer: 17.8cm -
4. Ratio Mixed ratio problems
£252.00 is shared between A and B in the ratio 3:4. How much does A receive?
Answer: £108.00 -
5. Statistics Mean
The mean of 4 numbers is 35. If 3 of them are 50, 49, 21, what is the missing number?
Answer: 20