Keystones — Lintel
Five GCSE retrieval questions · 10 October 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.093
Answer: 9.3 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 14x + 49
Answer: (x - 7)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 44°. Find opposite
Answer: 19.3cm -
4. Ratio Mixed ratio problems
£189.00 is shared between A and B in the ratio 5:4. How much does A receive?
Answer: £105.00 -
5. Statistics Mean
The mean of 6 numbers is 25. If 5 of them are 41, 29, 46, 48, 22, what is the missing number?
Answer: -36