Keystones — Lintel
Five GCSE retrieval questions · 4 January 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 93,000 in standard form
Answer: 9.3 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 14
Answer: (x + 7)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 25cm, angle = 43°. Find adjacent side. Give your answer to 2 decimal places
Answer: 18.28cm -
4. Ratio Mixed ratio problems
Divide 216 in the ratio 2:3:4
Answer: 48, 72 and 96 -
5. Statistics Mean
The mean of 5 numbers is 37. If 4 of them are 34, 18, 43, 47, what is the missing number?
Answer: 43