Keystones — Lintel
Five GCSE retrieval questions · 20 December 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
5800000
Answer: 5.8 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 14
Answer: (x - 2)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 38°. Find opposite
Answer: 20.3cm -
4. Ratio Mixed ratio problems
Simplify the ratio 7m:700cm
Answer: 1:100 -
5. Statistics Mean
The mean of 6 numbers is 21. If 5 of them are 44, 19, 26, 39, 42, what is the missing number?
Answer: -44