Keystones — Lintel
Five GCSE retrieval questions · 7 June 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00032
Answer: 3.2 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 35
Answer: (x + 7)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 65°. Find adjacent side
Answer: 12.3cm -
4. Ratio Mixed ratio problems
Express the first part of 5:4 as a fraction in simplest form
Answer: 5⁄9 -
5. Statistics Mean
The mean of 4 numbers is 26. If 3 of them are 45, 24, 34, what is the missing number?
Answer: 1