Keystones — Lintel
Five GCSE retrieval questions · 23 August 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0003 in standard form
Answer: 3 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 12x + 36
Answer: (x + 6)(x + 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 28cm, angle = 43°. Find opposite. Give your answer to 2 decimal places
Answer: 26.11cm -
4. Ratio Mixed ratio problems
£196.00 is shared between A and B in the ratio 3:4. How much does A receive?
Answer: £84.00 -
5. Statistics Mean
The mean of 5 numbers is 35. If 4 of them are 21, 43, 20, 47, what is the missing number?
Answer: 44