Keystones — Lintel
Five GCSE retrieval questions · 4 January 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00047
Answer: 4.7 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 14
Answer: (x - 2)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 27cm, angle = 40°. Find adjacent side
Answer: 20.7cm -
4. Ratio Mixed ratio problems
Simplify the ratio 7m:700cm
Answer: 1:100 -
5. Statistics Mean
The mean of 6 numbers is 33. If 5 of them are 22, 20, 44, 17, 16, what is the missing number?
Answer: 79