Keystones — Lintel
Five GCSE retrieval questions · 7 July 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00016
Answer: 1.6 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 8
Answer: (x - 2)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 52°. Find adjacent side
Answer: 17.2cm -
4. Ratio Mixed ratio problems
£189.00 is shared between A and B in the ratio 5:4. How much does A receive?
Answer: £105.00 -
5. Statistics Mean
The mean of 4 numbers is 23. If 3 of them are 46, 38, 16, what is the missing number?
Answer: -8