Keystones — Lintel
Five GCSE retrieval questions · 12 June 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0057
Answer: 5.7 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 32
Answer: (x + 8)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 38°. Find opposite
Answer: 9.4cm -
4. Ratio Mixed ratio problems
£297.00 is shared between A and B in the ratio 4:5. How much does A receive?
Answer: £132.00 -
5. Statistics Mean
The mean of 5 numbers is 23. If 4 of them are 42, 33, 37, 49, what is the missing number?
Answer: -46