Keystones — Lintel
Five GCSE retrieval questions · 6 January 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 990,000,000 in standard form
Answer: 9.9 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 12
Answer: (x + 6)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 32cm, angle = 41°. Find adjacent side. Give your answer to 2 decimal places
Answer: 24.15cm -
4. Ratio Mixed ratio problems
£280.00 is shared between A and B in the ratio 4:3. How much does A receive?
Answer: £160.00 -
5. Statistics Mean
The mean of 4 numbers is 39. If 3 of them are 34, 46, 36, what is the missing number?
Answer: 40