Keystones — Lintel
Five GCSE retrieval questions · 3 April 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
53000000
Answer: 5.3 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 13x + 42
Answer: (x - 7)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 13cm, angle = 53°. Find opposite
Answer: 17.3cm -
4. Ratio Mixed ratio problems
Simplify: 18:9:12
Answer: 6:3:4 -
5. Statistics Mean
The mean of 6 numbers is 38. If 5 of them are 37, 36, 30, 26, 35, what is the missing number?
Answer: 64