Keystones — Lintel
Five GCSE retrieval questions · 4 July 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.015
Answer: 1.5 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 30
Answer: (x - 6)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 23cm, angle = 34°. Find opposite
Answer: 15.5cm -
4. Ratio Mixed ratio problems
£125.00 is shared between A and B in the ratio 3:2. How much does A receive?
Answer: £75.00 -
5. Statistics Mean
The mean of 4 numbers is 34. If 3 of them are 20, 40, 34, what is the missing number?
Answer: 42