Keystones — Lintel
Five GCSE retrieval questions · 22 March 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 11,000 in standard form
Answer: 1.1 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 9
Answer: (x - 1)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 28cm, angle = 36°. Find opposite. Give your answer to 2 decimal places
Answer: 20.34cm -
4. Ratio Mixed ratio problems
Divide 180 in the ratio 1:4:4
Answer: 20, 80 and 80 -
5. Statistics Mean
The mean of 4 numbers is 38. If 3 of them are 46, 24, 41, what is the missing number?
Answer: 41