Keystones — Lintel
Five GCSE retrieval questions · 9 March 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00034
Answer: 3.4 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 10
Answer: (x - 2)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 14cm, angle = 50°. Find opposite
Answer: 16.7cm -
4. Ratio Mixed ratio problems
£196.00 is shared between A and B in the ratio 3:4. How much does A receive?
Answer: £84.00 -
5. Statistics Mean
The mean of 4 numbers is 39. If 3 of them are 24, 17, 46, what is the missing number?
Answer: 69