Keystones — Lintel
Five GCSE retrieval questions · 24 March 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 210,000 in standard form
Answer: 2.1 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 48
Answer: (x + 6)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 30cm, angle = 59°. Find adjacent side. Give your answer to 2 decimal places
Answer: 15.45cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4 hours : 10 minutes
Answer: 24:1 -
5. Statistics Mean
The mean of 6 numbers is 30. If 5 of them are 37, 31, 49, 17, 27, what is the missing number?
Answer: 19