Keystones — Lintel
Five GCSE retrieval questions · 27 July 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
8100000
Answer: 8.1 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 28
Answer: (x - 7)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 60°. Find opposite
Answer: 32.9cm -
4. Ratio Mixed ratio problems
Simplify: 8:4:10
Answer: 4:2:5 -
5. Statistics Mean
The mean of 5 numbers is 33. If 4 of them are 16, 36, 29, 15, what is the missing number?
Answer: 69