Keystones — Lintel
Five GCSE retrieval questions · 26 July 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
68000000
Answer: 6.8 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 30
Answer: (x + 6)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 14cm, angle = 48°. Find opposite
Answer: 15.5cm -
4. Ratio Mixed ratio problems
£235.00 is shared between A and B in the ratio 3:2. How much does A receive?
Answer: £141.00 -
5. Statistics Mean
The mean of 5 numbers is 38. If 4 of them are 49, 49, 27, 46, what is the missing number?
Answer: 19