Keystones — Lintel
Five GCSE retrieval questions · 3 February 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 540,000,000 in standard form
Answer: 5.4 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - 15x + 54
Answer: (x - 6)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 34°. Find opposite. Give your answer to 2 decimal places
Answer: 16.19cm -
4. Ratio Mixed ratio problems
£125.00 is shared between A and B in the ratio 2:3. How much does A receive?
Answer: £50.00 -
5. Statistics Mean
The mean of 5 numbers is 29. If 4 of them are 35, 20, 42, 26, what is the missing number?
Answer: 22