Keystones — Lintel
Five GCSE retrieval questions · 19 February 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 960,000,000 in standard form
Answer: 9.6 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 28
Answer: (x + 7)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 37cm, angle = 29°. Find adjacent side. Give your answer to 2 decimal places
Answer: 32.36cm -
4. Ratio Mixed ratio problems
In ratio 6:3:10, what fraction is the third part?
Answer: 10⁄19 -
5. Statistics Mean
The mean of 6 numbers is 36. If 5 of them are 16, 48, 28, 47, 37, what is the missing number?
Answer: 40