Keystones — Lintel
Five GCSE retrieval questions · 1 May 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0046
Answer: 4.6 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 14x + 49
Answer: (x - 7)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 33°. Find opposite
Answer: 16.9cm -
4. Ratio Mixed ratio problems
£168.00 is shared between A and B in the ratio 1:2. How much does A receive?
Answer: £56.00 -
5. Statistics Mean
The mean of 5 numbers is 40. If 4 of them are 42, 16, 36, 40, what is the missing number?
Answer: 66