Keystones — Lintel
Five GCSE retrieval questions · 30 September 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
2700000
Answer: 2.7 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 8
Answer: (x - 2)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 43°. Find opposite
Answer: 18.7cm -
4. Ratio Mixed ratio problems
Simplify the ratio 8m:800cm
Answer: 1:100 -
5. Statistics Mean
The mean of 4 numbers is 25. If 3 of them are 33, 43, 49, what is the missing number?
Answer: -25