Keystones — Lintel
Five GCSE retrieval questions · 20 August 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0004 in standard form
Answer: 4 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 16
Answer: (x + 8)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 32cm, angle = 35°. Find adjacent side. Give your answer to 2 decimal places
Answer: 26.21cm -
4. Ratio Mixed ratio problems
£217.00 is shared between A and B in the ratio 3:4. How much does A receive?
Answer: £93.00 -
5. Statistics Mean
The mean of 6 numbers is 29. If 5 of them are 22, 25, 26, 47, 26, what is the missing number?
Answer: 28