Keystones — Lintel
Five GCSE retrieval questions · 16 December 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
7600000
Answer: 7.6 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 16
Answer: (x - 4)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 14cm, angle = 59°. Find opposite
Answer: 23.3cm -
4. Ratio Mixed ratio problems
Express the first part of 5:2 as a fraction in simplest form
Answer: 5⁄7 -
5. Statistics Mean
The mean of 6 numbers is 35. If 5 of them are 43, 28, 15, 44, 24, what is the missing number?
Answer: 56