Keystones — Lintel
Five GCSE retrieval questions · 20 April 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
150000
Answer: 1.5 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 25
Answer: (x - 5)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 36°. Find opposite
Answer: 21.cm -
4. Ratio Mixed ratio problems
£280.00 is shared between A and B in the ratio 2:5. How much does A receive?
Answer: £80.00 -
5. Statistics Mean
The mean of 6 numbers is 33. If 5 of them are 17, 44, 48, 33, 30, what is the missing number?
Answer: 26