Keystones — Lintel
Five GCSE retrieval questions · 26 May 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
42000
Answer: 4.2 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 12
Answer: (x - 6)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 24cm, angle = 51°. Find adjacent side
Answer: 15.cm -
4. Ratio Mixed ratio problems
£280.00 is shared between A and B in the ratio 3:5. How much does A receive?
Answer: £105.00 -
5. Statistics Mean
The mean of 5 numbers is 36. If 4 of them are 28, 18, 20, 34, what is the missing number?
Answer: 80