Keystones — Lintel
Five GCSE retrieval questions · 16 October 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
6700000
Answer: 6.7 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 8
Answer: (x + 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 23cm, angle = 60°. Find opposite
Answer: 39.8cm -
4. Ratio Mixed ratio problems
£224.00 is shared between A and B in the ratio 3:4. How much does A receive?
Answer: £96.00 -
5. Statistics Mean
The mean of 6 numbers is 20. If 5 of them are 20, 30, 49, 26, 46, what is the missing number?
Answer: -51