Keystones — Lintel
Five GCSE retrieval questions · 5 June 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00074
Answer: 7.4 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 9
Answer: (x - 3)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 18cm, angle = 49°. Find opposite
Answer: 20.7cm -
4. Ratio Mixed ratio problems
£198.00 is shared between A and B in the ratio 1:2. How much does A receive?
Answer: £66.00 -
5. Statistics Mean
The mean of 6 numbers is 40. If 5 of them are 44, 49, 26, 41, 50, what is the missing number?
Answer: 30