Keystones — Lintel
Five GCSE retrieval questions · 14 February 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
97000000
Answer: 9.7 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 21cm, angle = 42°. Find opposite
Answer: 18.9cm -
4. Ratio Mixed ratio problems
£161.00 is shared between A and B in the ratio 5:2. How much does A receive?
Answer: £115.00 -
5. Statistics Mean
The mean of 6 numbers is 23. If 5 of them are 24, 28, 15, 50, 15, what is the missing number?
Answer: 6