Keystones — Lintel
Five GCSE retrieval questions · 20 June 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
40000
Answer: 4 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 14
Answer: (x + 7)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 25cm, angle = 51°. Find adjacent side
Answer: 15.7cm -
4. Ratio Mixed ratio problems
£200.00 is shared between A and B in the ratio 2:3. How much does A receive?
Answer: £80.00 -
5. Statistics Mean
The mean of 5 numbers is 23. If 4 of them are 19, 34, 43, 15, what is the missing number?
Answer: 4