Keystones — Lintel
Five GCSE retrieval questions · 29 January 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
21000
Answer: 2.1 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 12
Answer: (x + 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 23cm, angle = 41°. Find adjacent side
Answer: 17.4cm -
4. Ratio Mixed ratio problems
£294.00 is shared between A and B in the ratio 2:1. How much does A receive?
Answer: £196.00 -
5. Statistics Mean
The mean of 5 numbers is 28. If 4 of them are 19, 18, 44, 18, what is the missing number?
Answer: 41