Keystones — Lintel
Five GCSE retrieval questions · 19 December 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
18000000
Answer: 1.8 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 20
Answer: (x - 4)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 39cm, angle = 25°. Find adjacent side
Answer: 35.3cm -
4. Ratio Mixed ratio problems
£312.00 is shared between A and B in the ratio 3:5. How much does A receive?
Answer: £117.00 -
5. Statistics Mean
The mean of 6 numbers is 30. If 5 of them are 20, 40, 26, 18, 49, what is the missing number?
Answer: 27