Keystones — Lintel
Five GCSE retrieval questions · 7 June 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
93000000
Answer: 9.3 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 10
Answer: (x + 5)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 41°. Find opposite
Answer: 10.4cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4m:400cm
Answer: 1:100 -
5. Statistics Mean
The mean of 4 numbers is 30. If 3 of them are 35, 34, 33, what is the missing number?
Answer: 18