Keystones — Lintel
Five GCSE retrieval questions · 7 November 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0086
Answer: 8.6 × 10^-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 8
Answer: (x - 2)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 39cm, angle = 51°. Find adjacent side
Answer: 24.5cm -
4. Ratio Mixed ratio problems
£315.00 is shared between A and B in the ratio 2:5. How much does A receive?
Answer: £90.00 -
5. Statistics Mean
The mean of 6 numbers is 25. If 5 of them are 21, 30, 43, 15, 25, what is the missing number?
Answer: 16