Keystones — Lintel
Five GCSE retrieval questions · 15 January 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
38000
Answer: 3.8 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 9
Answer: (x - 3)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 22cm, angle = 26°. Find adjacent side
Answer: 19.8cm -
4. Ratio Mixed ratio problems
£272.00 is shared between A and B in the ratio 3:5. How much does A receive?
Answer: £102.00 -
5. Statistics Mean
The mean of 5 numbers is 39. If 4 of them are 19, 35, 31, 34, what is the missing number?
Answer: 76