Keystones — Lintel
Five GCSE retrieval questions · 13 November 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
65000
Answer: 6.5 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 40
Answer: (x + 8)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 17cm, angle = 33°. Find adjacent side
Answer: 14.3cm -
4. Ratio Mixed ratio problems
Express the first part of 5:2 as a fraction in simplest form
Answer: 5⁄7 -
5. Statistics Mean
The mean of 4 numbers is 31. If 3 of them are 37, 42, 39, what is the missing number?
Answer: 6