Keystones — Lintel
Five GCSE retrieval questions · 14 December 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.038
Answer: 3.8 × 10^-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 63°. Find adjacent side
Answer: 15.9cm -
4. Ratio Mixed ratio problems
Simplify the ratio 5m:500cm
Answer: 1:100 -
5. Statistics Mean
The mean of 4 numbers is 38. If 3 of them are 39, 37, 27, what is the missing number?
Answer: 49