Keystones — Lintel
Five GCSE retrieval questions · 12 June 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
550000
Answer: 5.5 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 48
Answer: (x + 8)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 16cm, angle = 49°. Find adjacent side
Answer: 10.5cm -
4. Ratio Mixed ratio problems
Express the first part of 3:4 as a fraction in simplest form
Answer: 3⁄7 -
5. Statistics Mean
The mean of 5 numbers is 26. If 4 of them are 29, 30, 30, 39, what is the missing number?
Answer: 2