Keystones — Lintel
Five GCSE retrieval questions · 16 May 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 66,000,000 in standard form
Answer: 6.6 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 12x + 11
Answer: (x + 11)(x + 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 32°. Find opposite. Give your answer to 2 decimal places
Answer: 15.62cm -
4. Ratio Mixed ratio problems
Express the first part of 14:11 as a fraction in simplest form
Answer: 14⁄25 -
5. Statistics Mean
The mean of 6 numbers is 34. If 5 of them are 26, 43, 47, 40, 29, what is the missing number?
Answer: 19