Keystones — Lintel
Five GCSE retrieval questions · 5 June 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 50,000 in standard form
Answer: 5 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 18
Answer: (x - 2)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 30cm, angle = 51°. Find opposite. Give your answer to 2 decimal places
Answer: 37.05cm -
4. Ratio Mixed ratio problems
Simplify: 8:12:24
Answer: 2:3:6 -
5. Statistics Mean
The mean of 5 numbers is 22. If 4 of them are 17, 20, 16, 34, what is the missing number?
Answer: 23