Keystones — Lintel
Five GCSE retrieval questions · 31 July 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
290000
Answer: 2.9 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 30
Answer: (x - 6)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 33cm, angle = 36°. Find adjacent side
Answer: 26.7cm -
4. Ratio Mixed ratio problems
Simplify: 20:16:24
Answer: 5:4:6 -
5. Statistics Mean
The mean of 5 numbers is 38. If 4 of them are 15, 18, 39, 15, what is the missing number?
Answer: 103