Keystones — Lintel
Five GCSE retrieval questions · 31 March 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.092
Answer: 9.2 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x - 8
Answer: (x + 8)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 16cm, angle = 35°. Find opposite
Answer: 11.2cm -
4. Ratio Mixed ratio problems
£120.00 is shared between A and B in the ratio 2:3. How much does A receive?
Answer: £48.00 -
5. Statistics Mean
The mean of 5 numbers is 22. If 4 of them are 44, 23, 20, 28, what is the missing number?
Answer: -5