Keystones — Lintel
Five GCSE retrieval questions · 11 May 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.077
Answer: 7.7 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 20
Answer: (x - 4)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 58°. Find adjacent side
Answer: 15.4cm -
4. Ratio Mixed ratio problems
£231.00 is shared between A and B in the ratio 2:5. How much does A receive?
Answer: £66.00 -
5. Statistics Mean
The mean of 4 numbers is 32. If 3 of them are 38, 23, 47, what is the missing number?
Answer: 20