Keystones — Lintel
Five GCSE retrieval questions · 3 February 2011 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 420,000 in standard form
Answer: 4.2 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 32
Answer: (x + 8)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 36cm, angle = 47°. Find adjacent side. Give your answer to 2 decimal places
Answer: 24.55cm -
4. Ratio Mixed ratio problems
£140.00 is shared between A and B in the ratio 5:2. How much does A receive?
Answer: £100.00 -
5. Statistics Mean
The mean of 5 numbers is 35. If 4 of them are 49, 50, 34, 16, what is the missing number?
Answer: 26