Keystones — Lintel
Five GCSE retrieval questions · 25 May 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
840000
Answer: 8.4 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 25
Answer: (x - 5)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 36°. Find opposite
Answer: 18.9cm -
4. Ratio Mixed ratio problems
£280.00 is shared between A and B in the ratio 5:2. How much does A receive?
Answer: £200.00 -
5. Statistics Mean
The mean of 5 numbers is 37. If 4 of them are 44, 30, 30, 18, what is the missing number?
Answer: 63