Keystones — Lintel
Five GCSE retrieval questions · 5 March 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
540000
Answer: 5.4 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 12x + 35
Answer: (x - 5)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 10cm, angle = 59°. Find opposite
Answer: 16.6cm -
4. Ratio Mixed ratio problems
Express the first part of 6:2 as a fraction in simplest form
Answer: 3⁄4 -
5. Statistics Mean
The mean of 6 numbers is 27. If 5 of them are 29, 41, 28, 26, 37, what is the missing number?
Answer: 1