Keystones — Lintel
Five GCSE retrieval questions · 18 July 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.03
Answer: 3 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 48
Answer: (x + 8)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 38°. Find opposite
Answer: 18.8cm -
4. Ratio Mixed ratio problems
£160.00 is shared between A and B in the ratio 3:2. How much does A receive?
Answer: £96.00 -
5. Statistics Mean
The mean of 6 numbers is 33. If 5 of them are 20, 42, 29, 30, 25, what is the missing number?
Answer: 52