Keystones — Lintel
Five GCSE retrieval questions · 8 September 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.048
Answer: 4.8 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 16cm, angle = 53°. Find opposite
Answer: 21.2cm -
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 5 numbers is 25. If 4 of them are 35, 38, 46, 24, what is the missing number?
Answer: -18