Keystones — Lintel
Five GCSE retrieval questions · 24 July 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.057
Answer: 5.7 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 12x + 35
Answer: (x - 5)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 37cm, angle = 31°. Find adjacent side
Answer: 31.7cm -
4. Ratio Mixed ratio problems
Simplify: 20:12:24
Answer: 5:3:6 -
5. Statistics Mean
The mean of 5 numbers is 28. If 4 of them are 44, 45, 21, 16, what is the missing number?
Answer: 14