Keystones — Lintel
Five GCSE retrieval questions · 6 February 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
590000
Answer: 5.9 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 28
Answer: (x + 7)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 54°. Find adjacent side
Answer: 16.5cm -
4. Ratio Mixed ratio problems
£301.00 is shared between A and B in the ratio 3:4. How much does A receive?
Answer: £129.00 -
5. Statistics Mean
The mean of 6 numbers is 34. If 5 of them are 25, 30, 27, 40, 32, what is the missing number?
Answer: 50