Keystones — Lintel
Five GCSE retrieval questions · 31 January 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
3500000
Answer: 3.5 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 12
Answer: (x - 2)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 52°. Find opposite
Answer: 28.2cm -
4. Ratio Mixed ratio problems
Express the first part of 6:4 as a fraction in simplest form
Answer: 3⁄5 -
5. Statistics Mean
The mean of 6 numbers is 29. If 5 of them are 46, 46, 23, 44, 29, what is the missing number?
Answer: -14