Keystones — Lintel
Five GCSE retrieval questions · 21 April 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.092
Answer: 9.2 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 12
Answer: (x + 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 13cm, angle = 41°. Find opposite
Answer: 11.3cm -
4. Ratio Mixed ratio problems
Simplify: 24:12:20
Answer: 6:3:5 -
5. Statistics Mean
The mean of 6 numbers is 38. If 5 of them are 33, 47, 19, 26, 32, what is the missing number?
Answer: 71