Keystones — Lintel
Five GCSE retrieval questions · 21 January 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
8300000
Answer: 8.3 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 8
Answer: (x + 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 21cm, angle = 48°. Find opposite
Answer: 23.3cm -
4. Ratio Mixed ratio problems
Simplify the ratio 7m:700cm
Answer: 1:100 -
5. Statistics Mean
The mean of 4 numbers is 32. If 3 of them are 19, 25, 22, what is the missing number?
Answer: 62