Keystones — Lintel
Five GCSE retrieval questions · 31 December 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
350000
Answer: 3.5 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 8
Answer: (x - 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 31°. Find opposite
Answer: 6.6cm -
4. Ratio Mixed ratio problems
Simplify the ratio 7m:700cm
Answer: 1:100 -
5. Statistics Mean
The mean of 5 numbers is 35. If 4 of them are 36, 25, 36, 33, what is the missing number?
Answer: 45