Keystones — Lintel
Five GCSE retrieval questions · 19 March 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00046
Answer: 4.6 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 16cm, angle = 26°. Find adjacent side
Answer: 14.4cm -
4. Ratio Mixed ratio problems
£216.00 is shared between A and B in the ratio 3:5. How much does A receive?
Answer: £81.00 -
5. Statistics Mean
The mean of 5 numbers is 20. If 4 of them are 34, 44, 46, 46, what is the missing number?
Answer: -70