Keystones — Lintel
Five GCSE retrieval questions · 19 September 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
84000
Answer: 8.4 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 3
Answer: (x + 3)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 27cm, angle = 28°. Find adjacent side
Answer: 23.8cm -
4. Ratio Mixed ratio problems
Express the first part of 3:2 as a fraction in simplest form
Answer: 3⁄5 -
5. Statistics Mean
The mean of 6 numbers is 27. If 5 of them are 29, 33, 50, 50, 27, what is the missing number?
Answer: -27