Keystones — Lintel
Five GCSE retrieval questions · 10 August 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0044 in standard form
Answer: 4.4 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 6
Answer: (x + 1)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 13cm, angle = 58°. Find opposite. Give your answer to 2 decimal places
Answer: 20.8cm -
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 4 numbers is 26. If 3 of them are 18, 32, 38, what is the missing number?
Answer: 16