Keystones — Lintel
Five GCSE retrieval questions · 23 January 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.043 in standard form
Answer: 4.3 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 24
Answer: (x - 3)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 40cm, angle = 52°. Find adjacent side. Give your answer to 2 decimal places
Answer: 24.63cm -
4. Ratio Mixed ratio problems
Simplify: 6:6:8
Answer: 3:3:4 -
5. Statistics Mean
The mean of 4 numbers is 37. If 3 of them are 48, 40, 27, what is the missing number?
Answer: 33