Keystones — Lintel
Five GCSE retrieval questions · 8 October 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.036 in standard form
Answer: 3.6 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 38cm, angle = 50°. Find adjacent side. Give your answer to 2 decimal places
Answer: 24.43cm -
4. Ratio Mixed ratio problems
£186.00 is shared between A and B in the ratio 2:1. How much does A receive?
Answer: £124.00 -
5. Statistics Mean
The mean of 5 numbers is 32. If 4 of them are 43, 32, 39, 29, what is the missing number?
Answer: 17