Keystones — Lintel
Five GCSE retrieval questions · 2 July 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
32000000
Answer: 3.2 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 24
Answer: (x + 6)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 16cm, angle = 56°. Find opposite
Answer: 23.7cm -
4. Ratio Mixed ratio problems
Simplify the ratio 5m:500cm
Answer: 1:100 -
5. Statistics Mean
The mean of 6 numbers is 38. If 5 of them are 23, 43, 43, 49, 39, what is the missing number?
Answer: 31