Keystones — Lintel
Five GCSE retrieval questions · 22 March 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0006
Answer: 6 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 20
Answer: (x - 4)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 59°. Find opposite
Answer: 31.6cm -
4. Ratio Mixed ratio problems
£190.00 is shared between A and B in the ratio 2:3. How much does A receive?
Answer: £76.00 -
5. Statistics Mean
The mean of 4 numbers is 20. If 3 of them are 24, 35, 17, what is the missing number?
Answer: 4