Keystones — Lintel
Five GCSE retrieval questions · 12 September 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
6800000
Answer: 6.8 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 56
Answer: (x + 8)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 44°. Find opposite
Answer: 19.3cm -
4. Ratio Mixed ratio problems
Simplify the ratio 7m:700cm
Answer: 1:100 -
5. Statistics Mean
The mean of 5 numbers is 38. If 4 of them are 33, 20, 20, 47, what is the missing number?
Answer: 70