Keystones — Lintel
Five GCSE retrieval questions · 16 January 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
76000000
Answer: 7.6 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 12x + 36
Answer: (x - 6)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 16cm, angle = 44°. Find opposite
Answer: 15.5cm -
4. Ratio Mixed ratio problems
Simplify the ratio 8m:800cm
Answer: 1:100 -
5. Statistics Mean
The mean of 6 numbers is 40. If 5 of them are 23, 28, 42, 44, 38, what is the missing number?
Answer: 65