Keystones — Lintel
Five GCSE retrieval questions · 15 July 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 89,000 in standard form
Answer: 8.9 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 36
Answer: (x + 4)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 10cm, angle = 43°. Find opposite. Give your answer to 2 decimal places
Answer: 9.33cm -
4. Ratio Mixed ratio problems
Express the second part of 4:8 as a fraction in simplest form
Answer: 2⁄3 -
5. Statistics Mean
The mean of 6 numbers is 36. If 5 of them are 36, 31, 49, 23, 41, what is the missing number?
Answer: 36