Keystones — Lintel
Five GCSE retrieval questions · 21 February 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 730,000 in standard form
Answer: 7.3 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 16
Answer: (x + 2)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 24cm, angle = 45°. Find adjacent side. Give your answer to 2 decimal places
Answer: 16.97cm -
4. Ratio Mixed ratio problems
Simplify the ratio 3 hours : 50 minutes
Answer: 18:5 -
5. Statistics Mean
The mean of 5 numbers is 32. If 4 of them are 43, 50, 37, 23, what is the missing number?
Answer: 7