Keystones — Lintel
Five GCSE retrieval questions · 29 December 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 76,000 in standard form
Answer: 7.6 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 24
Answer: (x + 8)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 20cm, angle = 58°. Find adjacent side. Give your answer to 2 decimal places
Answer: 10.6cm -
4. Ratio Mixed ratio problems
Simplify the ratio 5m : 40cm
Answer: 25:2 -
5. Statistics Mean
The mean of 4 numbers is 40. If 3 of them are 48, 49, 29, what is the missing number?
Answer: 34