Keystones — Lintel
Five GCSE retrieval questions · 15 November 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0085
Answer: 8.5 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 12
Answer: (x - 2)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 30°. Find opposite
Answer: 6.9cm -
4. Ratio Mixed ratio problems
£287.00 is shared between A and B in the ratio 5:2. How much does A receive?
Answer: £205.00 -
5. Statistics Mean
The mean of 6 numbers is 20. If 5 of them are 47, 40, 44, 31, 33, what is the missing number?
Answer: -75