Keystones — Lintel
Five GCSE retrieval questions · 9 February 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
41000000
Answer: 4.1 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 5
Answer: (x + 5)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 19cm, angle = 29°. Find adjacent side
Answer: 16.6cm -
4. Ratio Mixed ratio problems
£235.00 is shared between A and B in the ratio 3:2. How much does A receive?
Answer: £141.00 -
5. Statistics Mean
The mean of 5 numbers is 25. If 4 of them are 26, 46, 50, 24, what is the missing number?
Answer: -21