Keystones — Lintel
Five GCSE retrieval questions · 19 December 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.017
Answer: 1.7 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 8
Answer: (x - 2)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 21cm, angle = 62°. Find adjacent side
Answer: 9.9cm -
4. Ratio Mixed ratio problems
£297.00 is shared between A and B in the ratio 5:4. How much does A receive?
Answer: £165.00 -
5. Statistics Mean
The mean of 5 numbers is 35. If 4 of them are 18, 40, 43, 36, what is the missing number?
Answer: 38