Keystones — Lintel
Five GCSE retrieval questions · 19 June 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 5,700,000 in standard form
Answer: 5.7 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 8x + 16
Answer: (x + 4)(x + 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 16cm, angle = 52°. Find adjacent side. Give your answer to 2 decimal places
Answer: 9.85cm -
4. Ratio Mixed ratio problems
Simplify the ratio £2 : 50p
Answer: 4:1 -
5. Statistics Mean
The mean of 4 numbers is 36. If 3 of them are 17, 24, 34, what is the missing number?
Answer: 69