Keystones — Lintel
Five GCSE retrieval questions · 6 February 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 9,300,000 in standard form
Answer: 9.3 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 32
Answer: (x + 8)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 19cm, angle = 38°. Find adjacent side. Give your answer to 2 decimal places
Answer: 14.97cm -
4. Ratio Mixed ratio problems
Simplify: 24:8:24
Answer: 3:1:3 -
5. Statistics Mean
The mean of 6 numbers is 37. If 5 of them are 45, 50, 45, 47, 30, what is the missing number?
Answer: 5