Keystones — Lintel
Five GCSE retrieval questions · 19 October 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.049
Answer: 4.9 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 6
Answer: (x + 3)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 36cm, angle = 42°. Find adjacent side
Answer: 26.8cm -
4. Ratio Mixed ratio problems
Express the first part of 5:6 as a fraction in simplest form
Answer: 5⁄11 -
5. Statistics Mean
The mean of 6 numbers is 33. If 5 of them are 42, 46, 26, 45, 45, what is the missing number?
Answer: -6