Keystones — Lintel
Five GCSE retrieval questions · 22 January 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
53000000
Answer: 5.3 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 8
Answer: (x + 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 26°. Find adjacent side
Answer: 31.5cm -
4. Ratio Mixed ratio problems
£301.00 is shared between A and B in the ratio 3:4. How much does A receive?
Answer: £129.00 -
5. Statistics Mean
The mean of 5 numbers is 32. If 4 of them are 44, 42, 16, 36, what is the missing number?
Answer: 22