Keystones — Lintel
Five GCSE retrieval questions · 29 May 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0056 in standard form
Answer: 5.6 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 35
Answer: (x + 5)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 17cm, angle = 48°. Find adjacent side. Give your answer to 2 decimal places
Answer: 11.38cm -
4. Ratio Mixed ratio problems
Express the second part of 13:14 as a fraction in simplest form
Answer: 14⁄27 -
5. Statistics Mean
The mean of 4 numbers is 36. If 3 of them are 37, 20, 28, what is the missing number?
Answer: 59