Keystones — Lintel
Five GCSE retrieval questions · 18 June 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.073
Answer: 7.3 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 9
Answer: (x - 3)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 24cm, angle = 34°. Find adjacent side
Answer: 19.9cm -
4. Ratio Mixed ratio problems
£245.00 is shared between A and B in the ratio 3:2. How much does A receive?
Answer: £147.00 -
5. Statistics Mean
The mean of 5 numbers is 20. If 4 of them are 31, 18, 46, 38, what is the missing number?
Answer: -33