Keystones — Lintel
Five GCSE retrieval questions · 18 May 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
73000
Answer: 7.3 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 25
Answer: (x - 5)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 20cm, angle = 55°. Find adjacent side
Answer: 11.5cm -
4. Ratio Mixed ratio problems
£231.00 is shared between A and B in the ratio 4:3. How much does A receive?
Answer: £132.00 -
5. Statistics Mean
The mean of 6 numbers is 21. If 5 of them are 41, 32, 43, 25, 17, what is the missing number?
Answer: -32