Keystones — Lintel
Five GCSE retrieval questions · 17 February 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0057
Answer: 5.7 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 8
Answer: (x + 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 34cm, angle = 29°. Find adjacent side
Answer: 29.7cm -
4. Ratio Mixed ratio problems
Simplify the ratio 5m:500cm
Answer: 1:100 -
5. Statistics Mean
The mean of 4 numbers is 31. If 3 of them are 24, 41, 50, what is the missing number?
Answer: 9