Keystones — Lintel
Five GCSE retrieval questions · 5 December 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
600000
Answer: 6 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 16
Answer: (x + 8)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 21cm, angle = 55°. Find opposite
Answer: 30cm -
4. Ratio Mixed ratio problems
Divide 117 in the ratio 4:3:2
Answer: 52, 39 and 26 -
5. Statistics Mean
The mean of 5 numbers is 38. If 4 of them are 37, 20, 19, 19, what is the missing number?
Answer: 95