Keystones — Lintel
Five GCSE retrieval questions · 12 April 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 16,000 in standard form
Answer: 1.6 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 16x + 55
Answer: (x - 5)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 31°. Find opposite. Give your answer to 2 decimal places
Answer: 11.42cm -
4. Ratio Mixed ratio problems
£225.00 is shared between A and B in the ratio 2:3. How much does A receive?
Answer: £90.00 -
5. Statistics Mean
The mean of 4 numbers is 32. If 3 of them are 42, 47, 16, what is the missing number?
Answer: 23