Keystones — Lintel
Five GCSE retrieval questions · 15 October 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
87000
Answer: 8.7 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 7
Answer: (x + 7)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 22cm, angle = 27°. Find adjacent side
Answer: 19.6cm -
4. Ratio Mixed ratio problems
£441.00 is shared between A and B in the ratio 5:4. How much does A receive?
Answer: £245.00 -
5. Statistics Mean
The mean of 5 numbers is 34. If 4 of them are 19, 26, 34, 26, what is the missing number?
Answer: 65