Keystones — Lintel
Five GCSE retrieval questions · 11 May 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 36,000 in standard form
Answer: 3.6 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 27
Answer: (x + 3)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 36cm, angle = 61°. Find adjacent side. Give your answer to 2 decimal places
Answer: 17.45cm -
4. Ratio Mixed ratio problems
Simplify: 12:9:9
Answer: 4:3:3 -
5. Statistics Mean
The mean of 4 numbers is 39. If 3 of them are 42, 39, 31, what is the missing number?
Answer: 44