Keystones — Lintel
Five GCSE retrieval questions · 18 August 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
26000000
Answer: 2.6 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 12
Answer: (x + 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 41°. Find opposite
Answer: 21.7cm -
4. Ratio Mixed ratio problems
Simplify the ratio 3m:300cm
Answer: 1:100 -
5. Statistics Mean
The mean of 5 numbers is 22. If 4 of them are 29, 29, 38, 33, what is the missing number?
Answer: -19