Keystones — Lintel
Five GCSE retrieval questions · 28 January 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 4,400,000 in standard form
Answer: 4.4 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 12
Answer: (x + 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 25cm, angle = 61°. Find adjacent side. Give your answer to 2 decimal places
Answer: 12.12cm -
4. Ratio Mixed ratio problems
In ratio 5:3:8, what fraction is the second part?
Answer: 3⁄16 -
5. Statistics Mean
The mean of 5 numbers is 26. If 4 of them are 26, 15, 41, 18, what is the missing number?
Answer: 30