Keystones — Lintel
Five GCSE retrieval questions · 27 January 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 970,000,000 in standard form
Answer: 9.7 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 36
Answer: (x + 9)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 16cm, angle = 35°. Find opposite. Give your answer to 2 decimal places
Answer: 11.2cm -
4. Ratio Mixed ratio problems
£189.00 is shared between A and B in the ratio 5:2. How much does A receive?
Answer: £135.00 -
5. Statistics Mean
The mean of 5 numbers is 37. If 4 of them are 28, 38, 25, 43, what is the missing number?
Answer: 51