Keystones — Lintel
Five GCSE retrieval questions · 19 November 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
59000000
Answer: 5.9 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 14
Answer: (x - 2)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 39cm, angle = 57°. Find adjacent side
Answer: 21.2cm -
4. Ratio Mixed ratio problems
Simplify the ratio 7m:700cm
Answer: 1:100 -
5. Statistics Mean
The mean of 5 numbers is 32. If 4 of them are 24, 21, 30, 32, what is the missing number?
Answer: 53