Keystones — Lintel
Five GCSE retrieval questions · 13 January 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
820000
Answer: 8.2 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 42
Answer: (x + 7)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 32cm, angle = 62°. Find adjacent side
Answer: 15cm -
4. Ratio Mixed ratio problems
£185.00 is shared between A and B in the ratio 3:2. How much does A receive?
Answer: £111.00 -
5. Statistics Mean
The mean of 6 numbers is 40. If 5 of them are 40, 37, 49, 40, 23, what is the missing number?
Answer: 51