Keystones — Lintel
Five GCSE retrieval questions · 9 March 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000094 in standard form
Answer: 9.4 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 14x + 33
Answer: (x - 3)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 37cm, angle = 41°. Find adjacent side. Give your answer to 2 decimal places
Answer: 27.92cm -
4. Ratio Mixed ratio problems
£351.00 is shared between A and B in the ratio 4:5. How much does A receive?
Answer: £156.00 -
5. Statistics Mean
The mean of 4 numbers is 25. If 3 of them are 36, 20, 20, what is the missing number?
Answer: 24